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Running-in oil

dlknight

dlknight

PCGB Member
Member
Hi Folks,

Now I'm starting to build the bottom end of my engine I'm just about to purchase some mineral oil to do the initial running-in and bedding the rings.

From what I've read a good low-detergent mineral oil is what is called for.

Interestingly I've found a specific "running-in oil" from Millers which is about as cheap as it gets, £25 for 5L. There are also similar oils from Westway and Morris Lubricants, but slightly more expensive.

www.opieoils.co.uk

Running In Oil | Opie Oils

The UK's largest independent supplier of automotive oils, fluid and parts. We've products to suit any vehicle, from full blown Race / Track weapons, to Daily Drivers looking to save money. Plus FREE expert advice & recommendations - OPIE KNOW OILS
www.opieoils.co.uk

Valvoline do a standard 20W50 mineral oil (ZR1?) also but concerned about additives (plus it's more expensive than the Millers).

I was just concerned if I buy a "standard" multigrade mineral oil that it may have additives including detergents which might not be good whilst running-in.

On that subject is there any problem running a mono-grade oil instead of multigrade for running-in?

Either way I'm looking about £40 for 7L of Millers

Thanks

David
 
I pondered this myself, I spoke with AMAC and although they said a running in oil would be fine, they also said any basic non-synthetic mineral oil would be fine.

I ended up using a cheap as chips 20/50 mineral oil and it was fine. You are only going to do about 500 miles with it to bed in the rings, putting a bit of load on then coasting back down, rinse repeat...........

Stuart
 
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