Any reason not to use synthetic blend for 5k oci?

Joined
Dec 24, 2012
Messages
218
Location
illinois
Our 06 Corolla with about 128k my son using,I used full synthetic 5W-30 what ever on sale/rebated/clearance and oil filter from fram to purolator even AAP,Autozone,O reilly's house brand.Lately using kirkland for 15$ a 5 quart jug that's for 5k run,Engine is fine will outlast the whole car,the problem now is rust .Also regularly check oil level no consumption yet.
 
Joined
Oct 23, 2005
Messages
7,998
You haven’t lived until you’ve driven a 100hp powerhouse around a track
LOL

5000 you'll be fine on that engine. [looks for oil report]

I actually do have an old report on computer, ran several oils including Valvoline conventional to 5000 miles with good results.
 
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