Synthetic Oil Q?

[HuggerOrange]

I own a 20003 Chevy Silverado with 189K miles on it. I have always used 5W30 M1 changed at 10K miles. It has a slight oil pan leak but leaks very little.
I live in Kentucky and I will visiting some friends in Michigan this winter and was thinking about using a M1 0W20, 0W30, or a 0W40. Will any of these cause my oil pan to leak more? I was thinking that the 0W40 being a thicker oil would be the better choice. Any advice?

 

[HerrStig]

High mileage oil with a seal sweller. Valvoline comes to mind.

 

[HTSS_TR]

You may need to tighten the bolts a little.

 

[Toaster_Jer]

My 2cents would be to use 5w30 Valvoline MaxLife High mileage synthetic blend (Red bottle) And would be more stable than 0w40. The 0w30 would be just a tad thinner at full temps vs the M1 5w30.

 

[BrocLuno]

+1

 

[Rolla07]

Why not just keep using what you have been using? Just keep it topped off. Michigan in winter.. wish I could go south during winter...

 

[Merkava_4]

0W-40 would be a real benefit for that Chevy truck engine.

 

[Jake777]

i recently had good luck with Pennzoil High Mileage stopping a oil pump seal leak but I don't live in a really cold climate so I could see why you might want a semi syn or better.

 

[Branson304]

Your Mobil 1 5W-30 will work just fine in Michigan. Don't worry about it.

However, I would use Mobil 1 High Mileage 5W-30 in your truck but that's completely up to you.

 

[Oregoonian]

M-1 5w30 HM.....would be my choice.