So I called Amsoil for ya'. Tech support was omce again very helpful but I fell down when he started asking tech questions. So...I had to hang up, search online for an AT4 Tranny manual, figure out the OEM oil specs, and then call Amsoil back. With a better understanding of the tranny design, operation, and oil specs, I was able to convey the problem to the tech. He was quite knowledgeable and understood the situation. His only best product was this.
https://www.amsoil.com/p/10w-30-synthetic-small-engine-oil-ase/ [cid:eu.faircode.email.9004] I asked about API SF and as expected he explained they don't make that anymore. I asked about an ISO equivalent and he was unable to advise on anything. His best advice besides the aforementioned product was to stay away from automotive oils since they ALL include friction modifiers. He assured me that the small engine oil did not. I also asked about 10w-30 vs straight weight and he did acknowledge that there were additives to help the oil flow better at cold temps but defended the product in that it's coefficient of friction was not affected by the viscosity additives. So if you run out of options give this a try. All the best! Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD Aug 1, 2023 14:52:57 Della Barba, Joe <joe.della.ba...@ssa.gov>: > Nothing wrong with multi-viscosity oil at all. I use Shell Rotella 15W40 > diesel oil. It has been a long time since single-weight oil was the only > viable choice. > > I even use Shell 15-50 in airplanes now that are right up there with the A4 > for antique tech. > > Joe > > Coquina > > *From:* Josh Muckley via CnC-List <cnc-list@cnc-list.com> > *Sent:* Tuesday, August 1, 2023 1:55 PM > *To:* Stus-List <cnc-list@cnc-list.com> > *Cc:* Josh Muckley <muckl...@gmail.com> > *Subject:* Stus-List Re: [EXTERNAL] Re: Atomic 4 reversing - help, help > > Y'all piqued my interest. The Castrol website is a bit of a pain to find > their motorcycle product specs. Ultimately, I found all of the motorcycle > oils are multi viscosity. So it seems like Castrol is out of the picture. I > have little to no experience with Castrol tech support but can attest to > phenomenal tech support from AMSOIL. Call their tech support and explain the > problem they can most likely find a product for your application based on > friction coefficients and viscosity, not based on designated product > application. > > I was overwhelmed by the choices of hydro oil for my backstay. The > manufacturer simply said ISO 32. What!? Amsoil tech support was very > helpful and found their power steering fluid to fit the bill. > > > Best of luck, > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > Aug 1, 2023 11:28:58 Sylvain Laplante via CnC-List <cnc-list@cnc-list.com>: > > It's classification is API SP .. As I said look for API SF or older ( for our > engines ). Several antifriction were added after SH/SF and in addition to > that, they reduced the famous "ZDDP" additive which is so important for the > last level protection to prevent oil breakdown. That ZDDP can clog catalist > converter but our A4 don't have that problem :-) > > I've done a 5 day motoring with my A4 and it did not burn oil noticeably ( > still close to the dipstick top mark ) and not really black/dirty. Still > original 1975 A4 . I change oil twice a year and when it is hot since we > don't have an oil filter. > > Castrol site says a few things about motorcycle oils and this was the oil > Moyer used to recommend on it's site.. > > MOTORCYCLE VS MOTOR OIL | Castrol® > USA[https://www.castrol.com/en_us/united-states/home/motorcycle-oil-and-fluids/motorcycle-vs-motor-oil.html] > > > > > > > **MOTORCYCLE VS MOTOR OIL | Castrol® USA** > > Many drivers wonder if you can use normal oil for their motorcycles. Learn > the key differences to settle the iss... > > Sylvain > > 1975 C&C27 > > On Tuesday, August 1, 2023 at 10:36:06 AM EDT, Paul Hood via CnC-List > <cnc-list@cnc-list.com> wrote: > > This is the SAE30 oil I’m using. > > > > https://www.okpetroleummarketplace.com/castrol-sae-30-hd-30-motor-oil-6-quarts.html > > > > > > Paul Hood > > 416.799.5549 > > > > *From:* Joe Della Barba via CnC-List <cnc-list@cnc-list.com> > *Sent:* Tuesday, August 1, 2023 10:09 AM > *To:* 'Stus-List' <cnc-list@cnc-list.com> > *Cc:* j...@dellabarba.com > *Subject:* Stus-List Re: [EXTERNAL] Re: Atomic 4 reversing - help, help > > > > I would think about an oil change and use oil designed for motorcycles with a > wet clutch and see if that helps. > > > > Joe > > Coquina > > Please show your appreciation for this list and the Photo Album site and help > me pay the associated bills. Make a contribution at: > https://www.paypal.me/stumurray > Thanks for your help. > Stu >
Please show your appreciation for this list and the Photo Album site and help me pay the associated bills. Make a contribution at: https://www.paypal.me/stumurray Thanks for your help. Stu
