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I have no proof just but to my ears Castrol Syntec has made my engine quieter than PP, Royal Purple. I know Syntec doesnt get much love here but it works great for my 06 Accord V6 6 speed.

The syntec oil next to it is the old old bottle, what planet is this?

So far 191 views and only 2 people use Syntec! Looks like it hardly sells.

I'm using Castrol Syntec 5w-20 for my 06 Accord V6 6 speed. Just wondering who else on this site is using Castrol Syntec non German?

I'm using Castrol Syntec for my Accord and love it. Syntec is not highly regarded here but from my own experience it makes my car feel great. I would say Pennzoil Plantium is a very close 2nd. I have used royal purple before and it close to the performanc of the syntec but at double the costs...

I bought a 5 quart jug at chinamart last month. Its stamped 1/10/2007