Discuss need advice on high mileage oil on AllFordMustangs.com, the place for Mustang enthusiasts.
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Ok I have a 88 GT with 110,000 miles. I have only had car for 4 weeks. I put Maxlife in on the first oil change. I was thinking about using mobil 1 or mobil higher-mileage SuperSyn Fully Synthetic Motor Oil, but the car has used a quart in 2000 miles. I can see a little light gray smoke if I am behind the car and someone is getting hard on it. It also has a leak around one of the valves covers. It leaves about a haft dollar sizes spill each time the car is parked. Will the synthetic leak more then regular and burn more, should I stay with the regular?
2003 Mustang GT 3.73, Kenne Bell 2.1 Intercooler @ 10lbs 90mm MAF, 75mm TB, cold air kit, switch chip. 426 rwhp, 446 rwtq in shoot out mode,MMS caster camber plates, lower control arms and SFC
I put max life on my 88 gt with 122k miles on it.....it stopped almost all of the leaks like it said it would. I was leaking from the front side of the oil pan. I myself am very pleased with it. Synthetic won't do much for you in terms of leaks, neither improve or worsen the situation. Unless your mustang lives the life of a dog, stick with the regular.
I had Mobil 1 10w30 in my old motor and it came out of every gasket possible. I switched to Mobil 1 15w50 and that worked great. I had a really high mile motor that I put 200 shot of nitrous to and it worked great. I would highly recommed the 15w50 for a high mile engine.
1980 Mustang Cobra Carb'd and Juiced 306 AFR 185's Dynamic C4
10.83 @ 124 w/ NOS
11.86 @ 113 n/a
I know this is kinda off the subject but, does anybody recommend Prolong in their engines and trannies? I use Valvoline synthetic in my engine and Mobil 1 ATF in my T 5.
1992 LX 5.0, 12 inch K & N cone, SLP Loud Mouth dumps (for 98 and up Cobra), home made cold air box, underdrive pulleys, 75mm chrome Pro M MAF, bypassed airpump with short belt, Jeg's Universal Ford 2 row aluminum radiator, 16 inch electric fan, E cam, SVO 1.6 roller rockers, weld in subframe connectors, 16 degree timing, short throw shifter, Hotchkiss tubular UCAs and LCAs, Maxspeed springs, aluminum drive shaft,shorty headers, and BBK adjustable fuel pressure regulator, 3.73gears