Perhaps straightening some of the bends out of the tail pipe might help. The other thing is that one of the oil companies (possibly more) is pumping billions of gallons of water in the oil well to get out the thick crude from down deep in the earth. A good geologist will tell you that its NOT fossil fuel. Its made from the earths magma layer and crust from extreme heat and friction. Its comes out of the ground HOT and not cold. I had had more than one friend that worked for the oil companies, even on the rigs themsleves. One worked 40 years at it then retired a couple of hours from here. Bones are made from calcium, a mineral, and does not make oil. After all, how many quarts of crude do you get from Triceratops??? NONE! The earth makes billions of gallons of crude daily. That phrase came out in 1927. Besdies, how did they, the dinosaurs, get many miles deep in the earth?