Break-in oil

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Seth
Posts: 278
Joined: Thu Aug 12, 2010 4:45 pm

Break-in oil

Post by Seth »

I normally use synthetic, but what are your recommendations for break-in oil.
1975 R90S top end. New pistons and rings (OEM BMW).
Thx
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melville
Posts: 1827
Joined: Tue Aug 03, 2010 8:32 am

Re: Break-in oil

Post by melville »

I use Brad Penn 30W break-in oil with new rings or with something that sat for a while (like 30 years!). It stays in the motor for the first tank of gas or so, 200ish miles. Break-in riding is mostly accelerating and decelerating in gear, up and down, from 2K rpm to about 6K rpm. This has worked well for Airheads and ACVWs.

I haven't been able to get it locally but Speedway Motors should have it.
Call me Mel. Some years ago- never mind how long precisely- having little or no money in my purse, and nothing particular to interest me at home, I thought I would ride about a little and see the other parts of the world.
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jackonz
Posts: 212
Joined: Sat Oct 30, 2021 5:29 pm

Re: Break-in oil

Post by jackonz »

melville wrote: ↑Fri Apr 25, 2025 2:05 pm I use Brad Penn 30W break-in oil with new rings or with something that sat for a while (like 30 years!). It stays in the motor for the first tank of gas or so, 200ish miles. Break-in riding is mostly accelerating and decelerating in gear, up and down, from 2K rpm to about 6K rpm. This has worked well for Airheads and ACVWs.

I haven't been able to get it locally but Speedway Motors should have it.
That's correct just use a good quality straight 30w engine oil, back in the day when I was in an engine reconditioning shop we sold a Valvoline 30w monograde engine oil.
Phil J

Nelson NZ.
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