Changed rear diff. oil today. Specs call for 75W/140 synthetic. Local parts store had only 2 qts. of Valvoline Syn Lube. I used those but needed a bit more oil. Topped off with about 1/2 qt. of Lucas 85/140. Will I have any problems with this combo?
2003 Dodge 1500 - Rear Diff. Oil??
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