hey all,
after seeing several 'motor oil' discussions lately, i decided to inquire directly with Amsoil, as i have been considering trying an Amsoil product next. their response to my inquiry left a little to be desired, but i thought i'd share it basically as another data point to use for guidance.
here is the correspondence:
"hi, am wondering if you could answer a few questions regarding Amsoil product recommendations. i own a 1994 toyota supra turbo that is highly modified and making close 1000hp at the wheels. the engine is fully built with all forged internals, and is running on E85. car is a weekend fair weather car, and will see less than 5000mi annually. i am currently using Brad Penn motor oil, and am interested in trying Amsoil. i'm wondering:
1. which Amsoil motor oil would you recommend for best protection (i am not concerned with emissions or street legality)?
2. how often would you recommend oil changes?
3. many in my online car community discuss which motor oil to use. some recommend using commercial or "diesel" oil certified CI4 Plus - what do you think about this recommendation? any additional info you wish to volunteer is appreciated.
and keep in mind, supra enthusiasts are generally a bit obsessive, and are not afraid of spending a little extra for "the best" parts/materials for their hobby. your guidance could earn new customers!
thank you sincerely!
craig"
response:
"Craig,
Thank you for taking the time to contact AMSOIL with your questions. Sorry for the delayed reply to your email.
The best oil for this application would be our Dominator 10W-30 Racing Oil (product code RD30). The AMSOIL RD30 is fortified with a very high amount of ZDDP antiwear additives for maximum protection. It also is very shear stable and resistant to thermal breakdown. As far as drain intervals are concerned, we recommend following the manufacturer recommended drain interval.
Some engine builders have recommended using a diesel rated engine oil, mostly due to the fact that it has a higher amount of the antiwear additives, but the RD30 actually has a higher amount than oils meeting the API CI-4+ specification.
We hope this is helpful.
Darryn Wallace
Sr. Technical Service Representative
AMSOIL INC.
ADDRESS: 1101 Susquehanna Avenue, Superior, WI 54880
E-MAIL:
dwallace@amsoil.com
PHONE: 715-399-8324
FAX: 715-392-3097"