1993 Pontiac Trans Sport Owner's Manual - Page 218

If you're usingfuel rated at87 octane or NOTICE l higher and you still hearheavy I knocking, your engine needs service. Fuel that is more than % 5 Fuel But don't worry if you hear alittle methanol is bad for your Use regular unleaded gasoline rated at pinging noise when you're accelerating Don't use it. It can corrode me or driving up a h l . That's normal, and il parts in your fuel system and 87 octane or higher. It should meet specifications ASTM D4814 in the U.S. you don't haveto buy a higher octane damage plastic and rubber pa fuel to get rid of pinging. It's the heavy, That damage wouldn't be cove and CGSB 3.5-92 in Canada. These constant knock that means you have a under your warranty. And fuels should have the proper additives, 5 % or less, there must be so you should not haveto add anything problem. "cosolvents" and corrosio t the fuel. o What about gasolinewith blending preventers in this fuel to helD avola materials thatcontain oxygen, such as In the U.S. and Canada, it's easy tobe MTBE or alcohol? sure you get the right kind of gasoline (unleaded). You'll see "UNLEADED" MTBE is "methyl tertiary-butyl right on the pump. And only unleaded ether:' Fuel that is no more than1 % Fuel Capacity: 20 U.S. Gallons (76L). 5 nozzles will fit into your vehicle'sfiller MTBE is fine for your vehicle. Use unleaded fuel only. neck. Ethanol is ethylor grain alcohol. Be sure the posted octane at least 87. is is Properly-blended fuel that no morc If the octaneis less than 87, you may get than 10%ethanol is fine for your a heavy knocking noise when youdrive. vehicle. If it's bad enough, it can damage your Methanol is methyl or wood alcohol engine. 2 7 1 ...