0bLiViOuS
Go Kart Champion
- Location
- Orange County
M1 isn't full synthetic? How about castrol? Can I trust anything in life anymore??
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Lol nope it's not. I believe GC (German Castrol) is, but so many now are still blends even though they advertise otherwise. Just pick an oil you like and get an analysis done for the first few changes so you can see if you can extend your intervals.
I personally change mine at 5k miles just because $40 (I do my own changes) is worth the extra protection to me.