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what is your thinking in wanting to use a straight 30 wt. oil as opposed to a multi viscosity oil like a 5w-30 or a 10w-30 ?
the multi viscosity oil will flow better while the motor is cold, which is when most of wear occurs.
as far as the break-in additive goes, I would leave it in for no more than 250 to 500 miles, and try to get those miles driven in a short time period. Then be sure to change the filter when you change the oil.
Many, if not all, break in additives contain graphite. It can make your oil filter much less effective (plugs it up) and should not be used when normal oil & filter changes intervals (3000+ miles) are employed.
I don't think a break in additive is necessary. Just my subjective opinion. When my engine was overhauled 43,000 miles ago there was a liberal amount of assembly lube put on the cam and lifters. Otherwise, no additives in the oil.
Z.
p.s. nice looking engine by the way.
Edited by - zrayrichter on 04/11/2011 20:04:41
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Thanks
My reasoning for the 30 wt oil is that it is a special running in oil to help the piston rings bed in properly. I would leave this in for only 500 miles, then put in a multigrade.
I wondered if having break in lube in the 30 wt would be counterproductive making the oil too slippy for the rings to bed in ?.
So far I have only run the engine at 2000-2500 rpm for 20 minutes in the garage, and after doing the hot lash and the timing all seems good. I have changed the oil filter as I used graphite assembly past in certain locations.
Thanks all, be interested to hear views on this as I dont want to screw up.
Cheers.