Oil Change Interval

[jerseyguy123]

I know the common wisdom is once a year regardless of mileage. I have 3K on my Jeep Cherokee
at the one year mark and I am using Full Synthetic. What next?

 

[JohnnyJohnson]

What is your oils TBN and how does the fuel dilution look? If they are both in range I'd go for 18 months or at least until early October.

 

[atikovi]

Pretty sure the warranty says 1 year max regardless of the miles.

 

[JayhawkRoy]

If out of warranty I would go as long as 18 months or so. I have done that successfully in the past. In warranty, follow manufacturer's instructions.

 

[atikovi]

If out of warranty I would go as long as 18 months or so.

I have 3K on my Jeep Cherokee at the one year mark and I am using Full Synthetic.

Doesn't seem like it's out of warranty from that.

 

[zrxkawboy]

Doesn't seem like it's out of warranty from that.

I interpret that as 1 year/3k miles since the last oil change. Hopefully the OP can clarify.

 

[zrxkawboy]

I would decide based on usage during this OCI. Mostly long highway runs where it fully warms up? Run it longer. Lots of short trips? Change it now.

 

[atikovi]

I interpret that as 1 year/3k miles since the last oil change. Hopefully the OP can clarify.

Hard to tell without an explanation. I read it as he bought it new one year ago and has put 3,000 miles on it from the words, "I have 3K on my Jeep Cherokee"

 

[zrxkawboy]

Hard to tell without an explanation. I read it as he bought it new one year ago and has put 3,000 miles on it from the words, "I have 3K on my Jeep Cherokee"

Agreed: it could be taken either way.

 

[blufeb95]

If all you do is take a highway drive like once a week you could probably go two years, if you do tons of short trips, I'd probably stick to once a year.

 

[NiwradND]

If it were me, I would change it every spring, after the last frost. If you put less than 3000 miles on in a year, you could go 18 months, but I would change it each spring.

 

[Deleted member 89374]

 

[Bill7]

Short trippers allow moisture to build up in the oil which causes sludge.

To mitigate this, I have a strict 4k/6 month OCI whichever comes first.

 

[NiwradND]

Short trippers allow moisture to build up in the oil which causes sludge.

To mitigate this, I have a strict 4k/6 month OCI whichever comes first.

Thats why I change it every spring after the last frost, oil doesn't build moisture when it is above freezing.

 

[ElectroMechanoMan]

I’d go once a year in the spring. Winter driving, especially short trips, really contaminates oil with water vapor, and if direct injection, fuel dilution is a bit worse.

 

[tblt44]

My daughters bmw sat for just at a year with fresh 5w 40 castrol with only 200 miles on it. 1 year later I got it running again and left the 1 year oil in it. Only problem was fuel pump died within a week most likely due to olf fuel

 

[JeffKeryk]

Change it or drive more.

 

[zzyzzx]

I don't see how oil that's been in the ground for thousands of years suddenly goes bad at the 1 year mark jut because it's sitting in your engine. I think the "annual oil change" if you aren't driving is just made up, and has no scientific basis.

 

[Deleted member 89374]

oil that's been in the ground for thousands of years

How do you know it's been in the ground for thousands of years? Maybe most of the oil that's pumped out of the ground is a few weeks old, at the most.

 

[dave940]

Millions and millions of years. No additives coming from the wellhead, or at best, they're unrecognizable. And the inside of an engine can't replicate the conditions in a porous or fractured body of rock hundreds of feet underground.