6th Gear Poster
Join Date: Jul 2002
Location: West Orange, NJ
What's Better Oil..10W30 or 10W40??
I know that Synthetic oil is the best for our cars, but besides synthetic...what would be a better oil to run for a T-Bird with 130,000 miles on it.....I always use 10W30, but last time i changed my oil, my mechanic was telling me to use 10W40...He said it was better for my car with the amount of mileage it has on it.
I've never had a problem with 10W30...I used it on my 88 T-Bird, and now for 3 years on my 94 3.8L......Also I live in Jersey...Our winters get cold, and our Summers get hot....If that's any help
Also what's the real difference? which one is thicker? and why would one be better than the other?