Effects on synthetic usage on high mileage car?

[mariok2006]

I put Mobil Synthetic into my Corolla back when it had 83K miles on it for the first time. I am the second ownerof the car since 76K and I am assuming the owner used conventional oil before this.

Well I am at 88K and I have not noticed any improvement in performance (nor did I expect it) and I am planning on changing the oil back to Castrol conventional with a PureOne filter in a few days.

In fact, the car consumed about a 1.5 quarts of oil during the 5000 miles it has been in there... It kind of scared me at first, but as long as it is not leaking I should be okay right?

 

[Quattro Pete]

You were not looking for performance improvements, so what were you looking for by switching the car to synthetic? Just curious what your reasoning was...

 

[mariok2006]

My main reason was that the drain interval would have been about 3 times less often. Every 8-10K or so.

 

[wgtoys]

If you are going to do 5k change intervals than a good quality conventional lube like Castrol should be more than up to the job. If consumption remains an issue you might want to try a high mileage type oil. For non turbo charged, non-arctic conditions with 5k mile or less change intervals there is really no advantage to running Mobil 1 as compared to good quality modern conventional lubes.