Oil Change

Synthetic means man made. Aka recycled already used oil. There is only 5 oil companies.. Diff bottle same product. Only difference is additives. Same decayed dinosaur. And oil and gas (both run by big oil) is required to run cars that billions of people use daily. If you think car manufacturers and big oil aren't in business together your nuts. Would you pay for an $80 oil change if it didn't void your warrantee? Hell no, so why do we pay 80 bucks for the same product in the 20 dollar bottle? Because we were told by big oil or dealers "its better". Not better. Same dead dinosaur.

 

http://www.edmunds.com/car-care/top-7-urban-legends-about-motor-oil.html

Here you go

 

I love how this thread has devolved into a religious debate.

 

My grandfather back in the day used to use kerosine to flush out his engine before oil changes. My uncles all said the internals were spotless.

 

i do every 8-10k on synthetic

 

This pretty much. 8-10K interval on shell t5 synthetic oil for diesel but my 3rz 4 cylinder seems to like it.