- Joined
- Dec 30, 2006
- Messages
- 29,558
Discuss these otc synths. Why you like them and which one you feel is better (via add pack,base oil,opinion,lab tests,uoa`s,experience,which oil is "stronger",etc). All of these brands in 10W30:
Valvoline Synpower
Pennzoil Platinum
Pennzoil Ultra
Quaker State Ultimate Durability
Castrol Syntec
Valvoline Synpower
Pennzoil Platinum
Pennzoil Ultra
Quaker State Ultimate Durability
Castrol Syntec
Last edited: