All of my diesels have always gotten oil changes every 3000-3500 miles with Valvoline Premium Blue 15/40 in the warm season and Valvoline Premium Blue Extreme Synthetic 5/40 in the cold season.
The SUPERCAR gets Valvoline 5/30 every 3000 miles.
The SuperCar is a 91 Oldmobile Calais with 230K miles. Hey, it was a freebie 5 years ago.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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