I have a 86 pickup 4x4 with 266,000 miles the original owner said the motor was rebuilt and has about 10,000 miles on it but im not sure, i want this truck to last for a while so should i switch to syn. or go with reg. oil any recomendations?

 

search my friend!

all i run is full synthetic, not always the same brand though..

i like Mobile, castrol syntec, royal purple..

 

Yes, this has been beat to death on more than enough so hold on. If you go down about 24 or 30 post there is one on oil weights. My sugestion is in my signature. Synthetic is the way to go. If you decide on synthetics I can help you get it cheaper than retail. I also have a banner in the vendor section.
There will be tons of ideas and suggestions tho...Good luck

 

worse you could do is switch to synth oil and keep an eye on things. if you start to develop leaks, it's likely the front and/or rear oil seals weren't changed with the rebuild so switching back to dino oil or replacing the seals would then be the options.
but no leaks, and you're not burning excessive amounts of oil between changes, and you should be golden to go.

 

i appreciate the answers and im sorry i was lazy in doing my research i think im goin to switch to syn. and see what happens

 

I run regular oil in my '95, but synth in my 03 4runner and all of my motorcycles.

Regular oil is fine, but you have to change it regularly.