recommended oil weight on a fresh rebuild?
#2
Senior Member
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I just rebuild my motor with new bearings. It is still on the engine stand waiting for me to swap the intake manifold and accessories over.
I plan on using HD 30 wt. oil for the first few hours (30-45 minutes of idle then around 50 miles of driving. Then I will switch to some 40 wt. for another hundred miles or so then to my regular 10w30. I will change the oil again at around 600 then 1000 miles. From there it will be normal 3000 mile oil changes.
Why 30 wt.? Good question. I seem to remember reading that 30wt was recommended weight of oil from one of the major rotary engine builders (Mazdatrix?). And it is the break in oil that a friend of mine uses in his shop in piston engines.
I plan on using HD 30 wt. oil for the first few hours (30-45 minutes of idle then around 50 miles of driving. Then I will switch to some 40 wt. for another hundred miles or so then to my regular 10w30. I will change the oil again at around 600 then 1000 miles. From there it will be normal 3000 mile oil changes.
Why 30 wt.? Good question. I seem to remember reading that 30wt was recommended weight of oil from one of the major rotary engine builders (Mazdatrix?). And it is the break in oil that a friend of mine uses in his shop in piston engines.
#3
Senior Member
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GRRRRR... My first double post. I got an error page and hit reload.. Boom... 2 posts! I then tried to delete it and got a message saying I did not have permission to.
Last edited by CarmonColvin; 09-03-03 at 12:33 AM.
#5
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Some guys start off with the lighter 30 or 40 for the first 2 changes then switch to the heavier 20-50 from there on out. Im sure your going to get a lot of feed back but it basically comes down to preference.....if you look in previous oil posts you will see what i mean.
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