Engine oil AMSOIL or IDEMITSU

Also my main purpose is for wear protection and high temp protection etc which the regular line does exceptionally well

Idemitsu all day. It’s synthetic but what needs to be emphasized is the ingredient blend is purpose designed for a rotary to make the right lube + burn.

I've been running that exact oil in my rx8 for about 1k km now and its still as smooth as ever

From wear ratings and certification Amsoil, Pennzoil Ultra Platinum, Mobil 1 (Extended Interval). Amsoil I only use for track days, since I swap the oil out at 3.5-4K.

Real synthetic oil is way better than regular oil. Even full synthetic oil is better than regular oil. But if you want the best oil for the money look into Amsoil signature series. This oil is a true 100% synthetic oil and will prevent wear and quiet an engine down better than regular oil. I had a lifter tick in my Volvo 850 and it was caused by the pickup tube seal wearing away. I put Amsoil signature series in it and the film strength of the oil was so good it stopped ticking for a year before I had the seal replaced.

After 12 years and 45K miles. I took a 05 Mustang and added a supercharger. For the next three years , and 15K miles, I took it drag racing and high performance track day driving. Wanting more horsepower, I had the engine rebuilt with forged performance parts. When the engine builder measured the wear in the block, everything was still within factory specifications. I had used Amsoil for the life of the car.

personaly I use 5W-30 Amsoil, MANN oil filter and Hengst air and cabin filters

The best talaga ang [Amsoil](https://s.shopee.ph/7KbSRUV7OC)! Tested ko na sa car, bigbike at smallbike. Ramdam na ramdam ko pagiging smooth ng engine after magpalit.

Using 5W30 since deleting the MDS system from my engine. Amsoil Signature, every 6 months or 8000 km.

I called Amsoil and asked about this many years ago. They said for *my* bike, with the 5 speed tranny, they recommended the same 20w50 in all 3 holes.