cold weather break-in oil

[Kingsfisherman]

Hello,

I had my 98' 5.7 GSi rebuilt and I will be getting it back in the boat soon, but winter has started and I will be running it in temps above 0 degs-40's to break it in. What oil viscosity should I use? Manual says 20w/20 for temps 0-32 F and 30w for 32 degs and above.
Can't find any 20w/20 so now what?
TIA

 

[TijY_]

Cheap 5-10W40 ?


https://pubs.volvopenta.com/publications/7738812

 

[goblin]

https://maximausa.com/products/performance-break-in

Not recommended for street use though, which I'd guess means not catalytic converter friendly, in case this is a thing on yours. Or at least that's how I read it.

 

[Kingsfisherman]

Cheap 5-10W40 ?


https://pubs.volvopenta.com/publications/7738812

View attachment 309202

Thank you T,

I have the workshop manuals but not an owners manual. Good to have another reference manual. I will probably go with 20w/50 for both break-in and regular oil changes.

 

[Kingsfisherman]

https://maximausa.com/products/performance-break-in

Not recommended for street use though, which I'd guess means not catalytic converter friendly, in case this is a thing on yours. Or at least that's how I read it.

Thanks Goblin, no cats on my engine, I will check for availability at my local parts stores.

 

[TijY_]

Thank you T,

I have the workshop manuals but not an owners manual. Good to have another reference manual. I will probably go with 20w/50 for both break-in and regular oil changes.

Glad to help,

I thought you were worried about low temperatures. That manual states that it is for outside N. America.

Other sites recommends 15W40.
https://www.marinexpress.se/pdf/tips/oljerek_oljevol_bensin.pdf

 

[Kingsfisherman]

Glad to help,

I thought you were worried about low temperatures. That manual states that it is for outside N. America.

View attachment 309206

Other sites recommends 15W40.
https://www.marinexpress.se/pdf/tips/oljerek_oljevol_bensin.pdf

Thanks T,

well I am looking for advise on what viscosity to use for the break-in period, which it might end up being in temps from 0 F to 40 F. The workshop manual shows 20w/20 for those temps typically and 30w above 32F. I normally run 30w in it, but wasn't sure it that's a good viscosity for breaking-in the engine in those temps.

 

[marc1]

I use this on all my freshly rebuilt engines during break-in. It is certainly suitable for lower temperatures.

https://www.drivenracingoil.com/products/br30-5w-30-break-in-motor-oil-quart