Synthetic oils

Amsoil is not that much more than Mobile 1 these days...maybe $1.50 per quart at most.

Show me evidence it's worth the extra money. Bet you can't.

I have been using it in everything I own for years and racked up a lot of miles on my vehicles with 20,000 mile oil change intervals.

Show me evidence you couldn't have done the same, with the same results, with Mobil-1 or Castrol Syntec or similar. Bet you can't.

the stuff works.

Show me evidence it works better than Mobil-1 or similar. Bet you can't.

My friend put 230K on his GMC Sonoma using Amsoil in every part of his truck. He changed the oil at 18-20,000 mile intervals and it didn't burn a drop of oil

Show me evidence he couldn't have had the same result from Mobil-1 or similar. Bet you can't.

High end stuff will cost more but I think it gives better protection.

The Slick-50 effect: "I paid more; it must be better!" Marketing Psychology 101, day 1. The French Government did an experiment some years ago in which they got a bunch of cheeses, all the same, and divided them into two groups. One group sold for 33 centimes per kilo, the other for 66 centimes per kilo. Same cheese offered to the same shoppers at the same stores. The 66-centime cheese sold much more briskly. The lesson is obvious.

Hey, I bought a '92 LeBaron 2.5 with 70k miles on it, put in Mobil-1 and changed the oil every 16k miles. When I sold it with a coolant-leaky head gasket, it had 170k miles on it. The new owner reported the cylinders still had cross-hatch and no substantial top ridge when he pulled the head to replace the gasket. And all this without amazing, miracle magical Scamsoil…how is that possible?

(For those keeping score at home: my anecdote is equally worthless as his anecdotes as evidence)