Winter Oil?
 

Runnin 15-40 up here in N Illinois, just curious if I should modify that for winter now that it seems to be finally headin our way.

I'm in CO and run a 5w30 in the winter...

From what I've gathered after reading this forum, most people are in the south and can run the 15w40 throughout their "winter".

I'm in Philly, it gets pretty cold here in the winter. I'm currently running 15-40. The past couple weeks it's dipped below 32F and I've noticed sluggishishness while starting up on cold mornings. I may switch out to 5-40 for the upcoming winter months.

Let us know how the 5W works out. I'm in northeast CT and it's getting pretty chilly, colder than the oil chart sez I should be running the 15W40, but from what I've been reading it feels like there's just as many people having problems with the 5W stuff, mainly tapping and leaking, as those that have good experiences with it

I live on cape cod and last winter I ran shell rotella 5w40 and I saw a lot of leaking and seepage here and there. I'm going to try the shell 10w40 if I can find any around here. Gotta redo my oil pan gasket as well

I run Rotella 5w-40 all year.

second the 5w40 all year long. definitely helps winter start-ups.

Sooo many threads on oil....

so I broke down tonight and changed over to Rotella T6 5W40, it's getting down to 20 or lower at night and morning starts wrench the gut a little... we'll see how it goes. But this surprised me - it was about 25 in the garage when I did the change, didn't bother putting the heater on for the short period, and the 15W40 Rotella dino that I drained out had maybe a thousand miles on it at most.... and it came out looking like tar. Thick, gooey, black, nasty. If that crap was in my M5 the engine would lock up and die just from fear and spite. I had a Jeep with a 5.9 in it, and even at 365K and 3 - 4K between changes the oil didn't come out looking half as nasty. My 98 D1 only has like 86K on it, and doesn't burn a drop... are these old buick inspired motors really that dirty?

Yes, yes they are.

However, you cant judge how dirty a oil is by looks.

aj, what type of filter are you using?