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Shell Aeroshell Sport Plus 4 - thin

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peterthomson

Joined: 18 Jul 2010
Posts: 41
Location: Thailand

Posted: Sun Nov 07, 2010 6:51 am Post subject: Shell Aeroshell Sport Plus 4 - thin

This is the semi-synthetic oil designed for Rotax engines with integrated gearboxes, and tested by Rotax in conjunction with Shell. It is SL and 10W-40.



I changed from Shell Ultra Synthetic 4 stroke motorcycle oil (15W50) today, and found the Sport Plus 4 dropped my oil pressure below the Rotax minimum of 2 bar, 

 

I am going to change the oil pressure sender to double check, but suspect I will go back to the Ultra synthetic as I know the engine is sound, and I'm not going flying with the pressure outside the limit, not matter how good the oil is supposed to be.

 

Peter

Zenair CH701/Rotax 912ULS



  [quote][b]

lucien

Joined: 03 Jun 2007
Posts: 721
Location: santa fe, NM

Posted: Sun Nov 07, 2010 7:10 am Post subject: Re: Shell Aeroshell Sport Plus 4 - thin

 	  peterthomson wrote: 	
		  This is the semi-synthetic oil designed for Rotax engines with integrated gearboxes, and tested by Rotax in conjunction with Shell. It is SL and 10W-40.



I changed from Shell Ultra Synthetic 4 stroke motorcycle oil (15W50) today, and found the Sport Plus 4 dropped my oil pressure below the Rotax minimum of 2 bar, 

 

I am going to change the oil pressure sender to double check, but suspect I will go back to the Ultra synthetic as I know the engine is sound, and I'm not going flying with the pressure outside the limit, not matter how good the oil is supposed to be.

 

Peter

Zenair CH701/Rotax 912ULS



  	




That definitely doesn't sound right. 10w40 is an acceptable weight in the 912 over a very wide range of temps, your oil pressure should still be normal (mine is and I run 10w40, the aeroshell as a matter of fact).



The sender is the right place to start. Mine has a little over 400 hours on it and is beginning to show signs of the wear you hear about. It reads in the low 40's except during full power climbout where it drops to 38-9 (I know the motor is ok as I can pump up 40+ lbs by hand with the plugs out during oil changes)....



Otherwise, there's definitely a problem if your oil pressure really is below the minimum with 10w40....



LS

_________________
LS
Titan II SS

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Sun Nov 07, 2010 9:50 am Post subject: Re: Shell Aeroshell Sport Plus 4 - thin

Hi Peter,



The oil is not causing your issue. Here are a few things to check first. You may have inadvertently got a little air around the sending unit. Fly it a few times first to make sure this isn't the issue. Put a mechanical gauge in line with the oil pressure setup. You can see if this is a real problem right on the ground. This should always be the first thing to do if an oil pressure problem is suspected or needs to be diagnosed. My bet  is that the oil pressure is just fine and it's either, a little air, bad connection or a bad sender (99% of the time). The senders do go bad and read low way too frequently. If the oil pressure fluctuates quite a bit with throttle then look at your grounds. Even if it has a ground it may be a poor one if this symptom is present. The other tip I would give is to replace the oil pressure regulator setup. This is located just under the oil filter. It is the small 17MM nut. This is the oil pressure cap screw, spring and ball bearing. The new engines do not use these same parts and if you qualified for the 2000 hr. extended TBO these were a required replacement. 



I highly recommend this change for all 912 users.

Whether you qualify for the extra TBO on your engine or not this is a very worth while change. It takes all of ten minutes and parts are about $80. The parts are the cap screw 841-983, spring 838-122 and oil pressure regulator cone 857-230. The oil pressure regulator cone (or mushroom as some call it) replaces the ball bearing. It not only raises the oil pressure, but makes it more stable.

Keep us informed as we would like to know the out come.

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

Dick Maddux

Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl

Posted: Mon Nov 08, 2010 5:04 am Post subject: Shell Aeroshell Sport Plus 4 - thin

Pete,

  I agree with LS. Check that sender. Mine was bad and a new one gave me 10 lbs more oil pressure over the entire range. I checked the old one with my air compressor gage(unscientific) but it too showed the sender was10 lbs off.

  I have had no change in oil pressure since I started using Sport plus when it first came out.Tis a great oil I believe.

                                                Dick Maddux

                                                912UL

                                                             

 [quote][b]

Dick Maddux

Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl

Posted: Mon Nov 08, 2010 5:42 am Post subject: Shell Aeroshell Sport Plus 4 - thin

I highly recommend this change for all 912 users.

      Whether you qualify for the extra TBO on your engine or not this is a very worth

      while change. It takes all of ten minutes and parts are about $80. The parts

      are the cap screw 841-983, spring 838-122 and oil pressure regulator cone 857-230.

      The oil pressure regulator cone (or mushroom as some call it) replaces the

      ball bearing. It not only raises the oil pressure, but makes it more stable.

      

Roger,

  Do you have to purge if you open up this air hole ? I wouldn't think so ...but you are opening the system. I would think it would be like changing the filter. I have been thinking of doing this on my old engine

                                                    Dick Maddux

                                                    912Ul

 [quote][b]

bob(at)fly-ul.com
Guest

Posted: Mon Nov 08, 2010 5:56 am Post subject: Shell Aeroshell Sport Plus 4 - thin

On 05:11 AM 11/8/2010, Catz631(at)aol.com wrote:

 	  Quote: 	
		    

      I highly recommend this change for all 912 users.


	


I agree! My engine's TBO was raised by installing this kit, and even though it would be several years before it mattered (because I'm no where near TBO time), I decided to install the kit anyway, to get it over with. Yes, oil pressure appears to be just a little higher, and the biggest benefit I've seen is that it appears to be much more stable.



Heck, it took more time to remove the lower cowling to access this area, than it took to install the kit. No purge needed.





--

Bob Comperini

e-mail: bob(at)fly-ul.com

WWW: http://www.fly-ul.com

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Mon Nov 08, 2010 6:27 am Post subject: Re: Shell Aeroshell Sport Plus 4 - thin

Hi Dick,



No oil purge necessary for just these parts. You will loose .5-1 oz. of oil. It is a quick change. Just unscrew the old cap screw and have the new one in the other hand. Some oil will drool out. Drop the old cap screw and spring on the ground and the little ball bearing will come out on its own. Just make sure it did fall out so watch for it. Then immediately put the new parts in place. The new parts will stay together as a unit in the other hand. No need to try to put them in separately. It just takes a few seconds to actually swap the parts once the cap screw is loose. This is a worth while part change for all 912's whether you get the extended TBO or not.

Bob's right, it takes longer to remove the cowl than swap the parts.



p.s.

Make sure you safety wire the cap screw when you are done.

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

rlborger(at)mac.com
Guest

Posted: Mon Nov 08, 2010 7:24 am Post subject: Shell Aeroshell Sport Plus 4 - thin

Roger,



Are these parts applicable/worthwhile for the 914?



Been appreciating your knowledgable input on the forum, BTW.



Thanks,

Bob Borger

Europa Kit #A221 N914XL, XS Tri-Gear, Intercooled 914, Airmaster C/S Prop

http://www.europaowners.org/forums/gallery2.php?g2_itemId=60232

http://www.biplaneforumgallery.com/index.php?cat=10046

Europa Flying!

3705 Lynchburg Dr.

Corinth, TX  76208

Home:  940-497-2123

Cel:  817-992-1117

On Nov 8, 2010, at 8:27, Roger Lee wrote:



 	  Quote: 	
		   

 

 Hi Dick,

 

 No oil purge necessary for just these parts. You will loose .5-1 oz. of oil. It is a quick change. Just unscrew the old cap screw and have the new one in the other hand. Some oil will drool out. Drop the old cap screw and spring on the ground and the little ball bearing will come out on its own. Just make sure it did fall out so watch for it. Then immediately put the new parts in place. The new parts will stay together as a unit in the other hand. No need to try to put them in separately. It just takes a few seconds to actually swap the parts once the cap screw is loose. This is a worth while part change for all 912's whether you get the extended TBO or not.

 Bob's right, it takes longer to remove the cowl than swap the parts.

 

 p.s.

 Make sure you safety wire the cap screw when you are done.

 

 --------

 Roger Lee

 Tucson, Az.

 Light Sport Repairman - Maintenance Rated

 Rotax Repair Center

 Home 520-574-1080  TRY HOME FIRST

 Cell 520349-7056

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=318571#318571

bob(at)fly-ul.com
Guest

Posted: Mon Nov 08, 2010 9:46 am Post subject: Shell Aeroshell Sport Plus 4 - thin

On 05:51 AM 11/8/2010, Bob Comperini wrote:

 	  Quote: 	
		  On 05:11 AM 11/8/2010, Catz631(at)aol.com wrote:

>  

>      I highly recommend this change for all 912 users.

I forgot to mention one thing in my original "I agree" post... it occurs to me that Rotax probably doesn't just "re-design" a part (like the oil regulator assembly) for no reason. They must have discovered that this new regulator assembly is superior to the old one. So, just for that reason alone, I believe its worthwhile to make the change even if you don't care about the TBO increase benefit.

--

Bob Comperini

e-mail: bob(at)fly-ul.com

WWW: http://www.fly-ul.com

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Mon Nov 08, 2010 9:50 am Post subject: Re: Shell Aeroshell Sport Plus 4 - thin

Hi Bob,



Yes they are applicable for the 914. Some of the newer 914's can get an increase in the TBO just like the 912's if they meet the requirements of the 914 SB service bulletin. Some with older engines will not, but will benefit with the new oil pressure parts. Knowing what I know I would change the parts for my engine even if it did not qualify.

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

rlborger(at)mac.com
Guest

Posted: Mon Nov 08, 2010 10:05 am Post subject: Shell Aeroshell Sport Plus 4 - thin

Roger,



Aircraft is down for work anyway, so this is a good time to do it.  I'll order the parts today.



Bob Borger

Europa Kit #A221 N914XL, XS Tri-Gear, Intercooled 914, Airmaster C/S Prop

http://www.europaowners.org/forums/gallery2.php?g2_itemId=60232

http://www.biplaneforumgallery.com/index.php?cat=10046

Europa Flying!

3705 Lynchburg Dr.

Corinth, TX  76208

Home:  940-497-2123

Cel:  817-992-1117



On Nov 8, 2010, at 11:50, Roger Lee wrote:



 	  Quote: 	
		   

 

 Hi Bob,

 

 Yes they are applicable for the 914. Some of the newer 914's can get an increase in the TBO just like the 912's if they meet the requirements of the 914 SB service bulletin. Some with older engines will not, but will benefit with the new oil pressure parts. Knowing what I know I would change the parts for my engine even if it did not qualify.

 

 --------

 Roger Lee

 Tucson, Az.

 Light Sport Repairman - Maintenance Rated

 Rotax Repair Center

 Home 520-574-1080  TRY HOME FIRST

 Cell 520349-7056

rickofudall

Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA

Posted: Mon Nov 08, 2010 11:25 am Post subject: Shell Aeroshell Sport Plus 4 - thin

Bob, Keep in mind that Rotax builds engines for many different applications besides aircraft. It's just as likely that the "improvement" was to reduce the inventory count among several engine lines by having a common oil pressure relief valve piston. Wouldn't it be interesting if this same part set could be had from your local Harley Davidson / Buell dealer for $20. 

Rick Girard

On Mon, Nov 8, 2010 at 11:42 AM, Bob Comperini <bob(at)fly-ul.com (bob(at)fly-ul.com)> wrote:

 	  Quote: 	
		   --> RotaxEngines-List message posted by: Bob Comperini <bob(at)fly-ul.com (bob(at)fly-ul.com)>

On 05:51 AM 11/8/2010, Bob Comperini wrote:

 >On 05:11 AM 11/8/2010, Catz631(at)aol.com (Catz631(at)aol.com) wrote:

 >>

 >>      I highly recommend this change for all 912 users.

I forgot to mention one thing in my original "I agree" post.. it occurs to me that Rotax probably doesn't just "re-design" a part (like the oil regulator assembly) for no reason. They must have discovered that this new regulator assembly is superior to the old one. So, just for that reason alone, I believe its worthwhile to make the change even if you don't care about the TBO increase benefit.

 --

 Bob Comperini

 e-mail: bob(at)fly-ul.com (bob(at)fly-ul.com)

 WWW: http://www.fly-ul.com

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