Mixing oil types (5w-20 mixed with 10w-30)
My RV has the ford v-10 in it and I noticed today the oil is closer to the "low" level than the "full" level on the dip stick. I have a few quarts of 10w-30 (might be 5w-30) but I was going to top it ...
Forum Discussion
I understand the 5W-20 spec is primarily for increased fuel economy. If I were down by one quart and was driving 4 hours to my next oil change, I would add a quart of that higher viscosity oil. If for no other reason, the extra quart will help to remove more contaminants when drained.
