I have 5 VW pickups. I drive one myself. I polished the intake manifold, and the exhaust ports. I get 50 miles to the gallon. They are all Diesels except one. I am 90 years old. I have worked on them for 30 years. I used to buy them in Denver at the auction, fix them up and sell them. There are no more to be bought around here. I am going to sell them all and quit.