the guy from autozone told me to use 5w30 im my 1989 jeep wrangler with 78K miles but the owners manual says 10w30
which should i use?
2007-03-28 03:18:27 · 6 answers · asked by Mirza M 3 in Cars & Transportation ➔ Maintenance & Repairs
If I had a choice between trusting some guy behind a parts counter and the manufacturer of my car I know what I would chose - and I deal with parts counter guys every day.
Trust Jeep.
ASE Certified Automotive Service Advisor
2007-03-28 03:22:49 · answer #1 · answered by Naughtums 7 · 0⤊ 0⤋
if you already baught 5w30 and put it in then you are fine. Next time just get 10w30. I am suprised that the owners manual says 10w30 though. Double check that look at the temps for the oil specs. Either way you are fine with both
2007-03-28 13:25:06 · answer #2 · answered by rwings8215 5 · 0⤊ 0⤋
Follow the factory recommended viscosity. If you live in the north where the ambient temps. drop below zero personally I'd go for 5W-30 in the winter months. The oil is pumped upstairs quicker and the motor turns over easier and the viscosity's the same after the motors warms up. The most wear in any type of engine happens during cold start-up. Internal engine parts run cooler with low viscosity oil.
Go to: Joe Gibbs Racing Oil to see which viscosity they use for: #1. Qualifying #2. Plate Racing #3. Open (850) carb. racing.
2007-03-28 11:00:13 · answer #3 · answered by Country Boy 7 · 0⤊ 0⤋
Stick with the manufacturers recommendations, since they designed the engine to run with that grade. Multi-grade oils are similar, but 5w30 oil is usually only recommended for very cold weather, since it is slightly thinner in viscosity.
2007-03-28 10:28:07 · answer #4 · answered by Michael B 6 · 0⤊ 0⤋
Did the guy at Auto Zone design and manufacture your engine? Since the answer is "No", that obviously means he does not know what weight oil is best to use. The best weight oil to use is to follow what they manufacturer recomends.
2007-03-28 10:25:49 · answer #5 · answered by Anonymous · 0⤊ 0⤋
use what the factory tells you to.the factory made the engine and they know best.i have a 1988 olds and it says to use 5w30,but i use 10w30 and it doesnt hurt it.
2007-03-28 12:16:52 · answer #6 · answered by Anonymous · 0⤊ 0⤋