Bluesmoking newly restored engine

[Boosted LS1]

rev-erend said:

Another alternative oil is Millers CRO.

Also halfords do or used to provide a classic 20/50 oil.

[Jhonno]

Sardonicus said:

macdeb said:

VR1 is all I use. Having it running for half an hour at standstill varying revs will do it no favours. Should be start up, check for leaks, up to temp' and leave to cool. Then out on road as described earlier.

This ^ you have only hours to scuff in those rings once this window of opportunity as closed your left with the outcome be it good or bad in certain cases if your fortunate the oil usage may slow over thousands of miles of usage through further break-in but its slow if not next to nothing contrary to popular belief bog standard 20/50 VR1 is a mineral oil but it contains the necessary levels of zinc ZDDP for correct lubrication of flat tappet valve gear and ideal for 1st fill however Valvoline do a fully syn VR1 with a wider viscosity which I would only consider using after a few thousand miles have elapsed, I personally used Comp Cams (zinc too) break in oil for the 1st 300 miles and even though only a 5/30 showed good oil pressure and no noticable oil usage

Edited by Sardonicus on Friday 19th February 13:01

Yep.. This. I did cringe at the idea of it being started repeatedly and not run under load properly..

[Sardonicus]

Boosted LS1 said:

Also halfords do or used to provide a classic 20/50 oil.

And Morris oils do for the classics contains zinc too apparently

[Steffo]

Haven't had time to visit the forum for a few days (and not my garage either), very happy to see more contributions to this discussion! Seems like all indicates that I will not have to take the engine apart once again and that feels very refreshing indeed. I will certainly change the semi synthetic oil to one specified for break-in purposes before firing up again. Really hope that this oil hasn't damaged my break-in chances now ...

And yes, to clarify: The engine is a full rebuild with new liners installed by V8 Dev. However used pistons, but all were measured thoroughly before assembling.

I'll post again when next step is taken. Looking out of the window now, watching the snow fall ...