I have a 1999 chevy 2500 classic with a 350 that has 268,000 miles on it. I drive it maybe 5000 to 6000 miles a year now. I use conventional 5w-30 Castrol, I change the oil every 5000. I live in California no extreme weather changes. Should I wait a year to change the oil, or maybe every six months to be safe.
I do about the same miles for the same engine but I got a 93 silverado with a 350 in it but for it being so old I like changing it every 4 months or when the oil gets pretty dark which ever goes first. I mean I probably don't need too but I enjoy changing the life blood of my vehicle. I also look at the back of the 5 qt of oil I buy to make sure of the quality and I find the cheapest one I can get and go with that and I like using K&N filters with the synthetic filter material.
every year
Because I use conventional oil, I change it every 3000 miles no matter what anybody says.
I have been driving since 1968 and in all the vehicles i've owned up to this very day, I change the oil every 3000 miles. I've never had an oil related problem in the dozens of vehicles i've owned. Do what you want. Believe what you will.
Every 5,000 miles or once a year, whichever comes first.
1 year or 5k miles, whichever comes first.
