best oil for 420A turbo?

[starfish]

I need to change my oil and I was wondering what ## motor oil you guys use during the winter months for a turbo 420A.NO synthetic please.

[pur97tsifwd]

Mobile one 5w30 or 10w30 why no synthetic

[glowryder]

Is it a performance build? Id so it depends on your bearings and tolerances...I use Scaffer SAE 30

[jayson427]

everyone has their different advice on oil. i have used castrol, castrol synthetic, mobil one and synthetic mobil one. i have stuck with mobil one syntheic recently after breaking in my motor. it works awesome. 5w30 will probably be your best bet for winter months no matter what brand you go with.