Oil for new engine
Thread Starter
Drifting
Joined: Jun 2000
Posts: 1,476
Likes: 1
From: Mt Juliet TN
Oil for new engine
Can anyone suggest an oil weight for a newly rebuilt engine. Also is there anywhere on the net on the procedures for starting a new motor. All I know is run it at 2500 to 3000 rpm for 20 minutes.
Team Owner
Joined: Aug 1999
Posts: 28,704
Likes: 4
From: Fort Mill, SC via NJ
Re: Oil for new engine (TTop Tony)
Some say 500,700,1500+miles.
Lots of opinions.
My guy is well known as a performance engine rebuilder and has been in business for over 25 years.
He said about 500 is fine for the synthetic change over.
Lots of opinions.
My guy is well known as a performance engine rebuilder and has been in business for over 25 years.
He said about 500 is fine for the synthetic change over.
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Drifting
Joined: Sep 2000
Posts: 1,355
Likes: 0
From: Germantown Maryland
Re: Oil for new engine (TTop Tony)
My engine builder recommends 15/40W also. I use Valvoline. Whatever the breakin, make sure the rings are seated prior to changover to synthetic oil. car should not be using significant oil and smoking should stop. 1000 miles is good.
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Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
Re: Oil for new engine (TTop Tony)
Right, Tony. The reason that synthetics are avoided in high mileage engines is because of the smoother consistency of the molecules. It's much easier for a synthetic molecule to slip through a small hole and leak, while the thicker conventional oil has a tendency to act as its own stopgap, pretty much.
-Steve
-Steve
Thread Starter
Drifting
Joined: Jun 2000
Posts: 1,476
Likes: 1
From: Mt Juliet TN
Re: Oil for new engine (Pacin'California)
Thanks Steve. One last question (I promise) why do you wait 1,000 miles before using synthetics? Why not start using them right away. Someone told me the modern Vettes come with synthetics from the factory.