SmokinBBC
Well-known member
There is a lot of info out there about Synthetic vs Conventional motor oil. My engine builder said I could use synthetic. He said that I could switch after 500 miles when I need to make the second oil change. EDIT WRONG: After talking to him again, he said switch at the 3rd oil change or about 3k miles. He made the first change when he broke the engine in on the dyno with conventional oil. He is a trusted builder who does all types of engines from classic cars to all out race engines.
My engine has roller lifters and rockers. The rings were seated on the dyno. After 500 miles, I have no oil consumption that I can tell from the dipstick or spark plugs. The oil is clean.
So here's my question. Just when do you switch to Synthetic? Most articles that I read suggest waiting until the motor (new and rebuilt) are fully broken in which is 6000 to 8000miles. Royal Purple says to wait until there is a minimum of 2000 miles on the engine before switching. I know that some new high performance cars come from the factory with synthetic oil, so there is some "slop" in these articles.
I have not yet decided to switch to synthetic since I'm not fully convinced that it would benefit my engine. I am using conventional oil for the 500 mile change.
My engine has roller lifters and rockers. The rings were seated on the dyno. After 500 miles, I have no oil consumption that I can tell from the dipstick or spark plugs. The oil is clean.
So here's my question. Just when do you switch to Synthetic? Most articles that I read suggest waiting until the motor (new and rebuilt) are fully broken in which is 6000 to 8000miles. Royal Purple says to wait until there is a minimum of 2000 miles on the engine before switching. I know that some new high performance cars come from the factory with synthetic oil, so there is some "slop" in these articles.
I have not yet decided to switch to synthetic since I'm not fully convinced that it would benefit my engine. I am using conventional oil for the 500 mile change.
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