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Is Ford using 10W-30 in new Super Duty diesels? If so this would be wrong oil per Ford when diesel fuels with B5-B20 are used and are the norm in my area at least. Image is from 2019 super duty manual. (was in Spanish--my mistake) If so, I will change oil in F-350 diesel to 5W-40 (Rotella...

2000 Nissan Maxima with 185,000 miles, 5500 miles on oil, Na 199, K 9, TBN 1.5 One and only UOA has high sodium and potassium(?) so I am concerned if there could be a head gasket problem. Car runs well with oil color good (not milky), no exhaust smoke, runs at ideal engine temperature... About...

Please give oil and filter recommendation for 2014 Acura MDX. 1. What kind of vehicle you have 2014 Acura MDX with optional transmission cooler to provide tow capacity rating of 5000 lbs. Currently with 6000 miles on MDX with oil and filter changed once by dealer (was free and they may have...