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.
I live in a dusty climate I change my oil at least annually and I use Mobil one in my Volvo, Kirkland synthetic in the kids cars, and rotella in my air cooled vw.
I use Rotella T6 5W40 on my stock motor STI.
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.
now im using shell long ride currently at 1500km and i havent feel any vibration yet and its cheaper than amsoil.
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.
I use Amsoil. While not on the official VW list as an approved oil, it is never the less formulated to the VW spec.
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