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Hi, my name is Larry and i just bought a 1993 5.8 4x4 f250 and need to know if it matters what octane of gas i run for the best gas mileage. if there is any sites where i can get tech info about how often do i do a tuneup what type of oil is good, spark plugs to use ect. thank for the help in advance.
If you have the owners manual which I doubt with a truck that old it would tell you. Otherwise just search it on google. I would assume 87 since that is usually the normal. Far as oil I would get some kind of highmilage kind that is suppose to help clean up the engine some since it is a 93. I leave the tune up and spark plugs to others, i know there are some specific spark plugs you will want but i dont remember which they are .
Hi Larry. I have a 94 with the 5.8 nd I run 87 octane. I have the owners manual (strangely enough) nd that's what it calls for. High mileage oil is a good idea, just ensure u use high quality stuff. I use Castrol GTX. Lots of us here on FTE use copper plugs, some use platinum and very few use iridium. Whatever u do use a high quality rotor, distributor cap and the best wires u can afford. Keep #7 nd 8 as far from each other as u can so they don't fire by induction. Change oil when u want but certainly no longer than 10,000 kms. Use quality filters, avoid Fram. That's about it. Good luck.
Hey Larry, if you get a chance to go thru these threads look for an post on a "sixliter tune up". It works well on a 5.8... as for the better filters NAPA/WIX, CARQUEST and MOTORCRAFT ... NAPA sells one # 1773 for the 5.8, it holds an extra 1/2 qt of oil ... Carquest has it too under another number. Just my $.02 worth, I ALWAYS start my oil refill with a qt of Lucas !!! ... Dave
1990 F250,Custom, Ext. Cab w/351w, ZF 5-42, 3.55 (4x1 open diff) and only 218,000 + mi. 3G ALT, 265*75*16's on 16X10 Eagle alloys , 6 Liter tune up, 98 Windstar E-fans DONE... My physical limitations made me sell my truck, but didn't remove it from my heart !!!
"IT'S DEPENDABLE AS AN OLD FRIEND" ... GONE BUT NOT FORGOTTEN !!! Till next time !!!
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