Do you own a 1979-1993 Foxbody Mustang? What Oil do you use? I have a 1991 LX Coupe 5.0 with 200,000 Kms a lot of bolt-ons, stock block, Stock Heads and cam, Explorer Intake, Full-length 1-5/8th Longtube headers, Electric Flex-A-Lite fan runs so cool, underdrive pulleys, 75mm mass air, 70 mm Throttle body, Stock airbox with K&N air filter, 3 core rad, and 4.10 gears with Mickey Thompson Street S/S 255 50 16 on pony rims she pulls so hard and grabs the road like glue, it still drives like the first day I bought it back in May of 1991. I use Mobile 1 fully synthetic 10W30 oil. should I use Mobile 1 High mileage fully Synthetic oil? I have also used 20w50 Ams oil but I find it's too thick and my car feels sluggish so I stayed with mobile 1 fully synthetic 10w30.
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