Hi everyone! New guy here. I recently got a new used 1991 S-10 (for free!) with 178,000 miles. The previous owner, my Father in Law, always ran Quaker State dyno in it and the truck has never given him a bit of trouble. I am tempted to stick with that since it seems to have worked well so far. Thought I would get some other opinions, however. I use the truck for a lot of short trips. Mostly just Lowe's and Home Depot type runs and I drive it easy. Any advice would be appreciated!