boricua_in_atl

i heard people said that syntetic old is not good and some people said is good

My5ABaby

iTrader: (7)

Nnnnnnnnnooooooooooooooooooooooooo. (Darth Vader) Not this again...



From the FAQ:
Can I use synthetic oils in my Rotary engined car?
Yes and no. Mazda offically does not recommend the use of synthetic oils in rotary engines, however, long term and racing use has shown that the better synthetics (Redline, Amsoil, Neo, Royal Purple, Mobil1) are perfectly fine to use in a rotary engine, and will generally result in a 1 to 2% horsepower gain. However use of poor quality synthetics (like Valvoline, Castrol Syntec, Havoline, Etc) will result in build up due to high ash content left from these oils when they are burned. It is believed that is why Mazda did not recommend synthetics, because the couldn't pick favorites.

classicauto

iTrader: (3)

run whatever makes you feel better......some people say the synthetic will leave more deposits but I've never seen hard evidence of this.

and +1 for re-living the endless nightmare of oil debate.

cool_as_crap

search 'synthetic'

Icemark

Covered in the FAQ for FC sticky thread found at the top of this, the 2nd gen RX-7 Technical section.

Please read the FAQ for FC sticky thread before posting. Many of the commonly asked questions, such as the one this thread was started with are answered there.

Thread closed. Covered in the FAQ for FC sticky thread.