Is it true that if the wrong engine oil is used that it will cause the engine to run irratically?
1991 liberty engine oil
Nov 20, 2004
2 Replies
false: oil that is fuel fouled will, so engine wear and how it is used ie short trips long trip etc determines how soon the oil will deteriorate
I have now discovered that it is true. I was using oil that was too heavy-20w-50. Having changed to 10w-30 the problem has gone.
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