Alright about time to change the oil in the G. First one since switching to this vehicle. I have always used Mobil 1 Full Synthetic in all of my vehicles (Minus rx-7's). My question is what is the best weight people have experience with these vehicles? I live in Columbus, GA and summer is soon approaching so temps will be 90+ and even 100+ in the summer. Any insight would be greatly appreciated!

 

I use 10w30 in summer and 5w30 in winter

 

...

 

10w30 summer, 5w30 sin winter. That's pretty much what I was thinking about going with. I am waiting for what follows the ... ;-)

 

This past winter, I ran 0w30 German Castrol and loved it. The car warmed up faster and my gas mileage improved compared to the previous winter(about 30 more miles per tank). I'll be coming up on 90k milles just before summer and will most likely switch up to 5w30 after I have an oil analysis performed. I've run 10w30 a summer or two ago and def didnt appreciate losing nearly 40 miles per tank!

 

What about running 5w40 all year round?

 

It really depends on the climate in your area. In Maryland, we get the extremes of each season; bitter cold winters and blazing hot summers. That allows me a little "flexibility" in selecting an oil that would provide optimum protection/performance for my engine during a particular season.

 

I used Mobl1 5W30 all year round, in PA.

 

I use maxlife syn 5w-30 year round per the owner manual.

 

X2 Mobil 1 Full Synthetic

 

I use royal purple 5w-30 all year round and love it.

 

If Mobil 1, 0W40.

 

0w30 German Castrol

 

Where do you guys get your G.Castrol from?

I visited Fargo last weekend and they didnt have any at the walmart.

Just the US made castrol but not the GC.

 

if you use synthetic after how many miles you change oil?