[W///]

Originally Posted by Z K

I changed my oil out for Mobil 1 0w40 this weekend.

I had a cocktail of Redline 0w40 and 10w60. It was a mix of 3 quarts 0w40 and 6 quarts of 10w60 Redline. The Redline oil really made the car feel sluggish compared to TWS and it didn't really want to rev. I tried to make the 10w60 thinner by mixing the 0w40 in but I probably didn't put in enough 0w40 to really make a difference. I dumped my Redline oil with only 200 miles on it (wasted my money on that!) and got Mobil 1 0w40.

Walmart was sold out of the 5 quart jugs and I ended up cleaning their shelves of 0w40 with 9 single quart jugs... it cost a lot more but still cheaper than any auto parts store.

Cold start up I don't really notice any difference. It still takes a while to warm up. Gas mileage I don't notice any change. The difference I could definitely feel is the speed the engine revs now! The engine feels so much more responsive and it wants to rev fast. The RPMs climb much faster and more willingly than on the Redline. I took the car to autocross yesterday and the car felt great on the 0w40. Coming out of corners, you get instant throttle response. The willingness to rev fast really makes the car feel alive.

Lesson learned ... don't use Redline 10w60!

In cold weather, I can def tell that M1 heats up significantly faster than 10W60. Maybe it's not as apparent as warm weather. But during my 20 mins commute to work, 10W60 would barely reach 210F as I pull in the parking. M1 heats up faster to the 1/3 mark for sure, then it takes as long as 10W60 to reach 210F. That's still absolutely worth it to me though.

Plus you can't beat $26 for 5qt jugs. ~$50 for oil per oil change? Win