What is the thickest oil you've ran in the winter?

[skyactiv]

I grew up next to Lake Erie in Ohio and had a 73' VW Beetle during my junior and senior years of high school in the 90's. I ran Castrol 30W year round.

 

[Lubener]

20w-50 in a 69 Plymouth in Cleveberg, Ohio

 

[Drosselmier]

10w30 would have been my thickest oil. now it is 5w30 . Not much difference.

 

[HerrStig]

10"W" 40 in a SAAB. Big starter motor, no problem.

 

[rollinpete]

70's and 80' ran quaker state 10w40 ( and they all ran well with it)...

 

[Quattro Pete]

Ran some mineral Quaker State 10w-40 in my old '91 Stanza in northern NJ back in the mid 90s. Fast forward 20 years, and I'm still running 10w-40, although it's synthetic this time.

 

[bullwinkle]

Castrol GTX 20W50, in the '80s-and winters were a LITTLE colder back then!

 

[bdcardinal]

5W50 but I don't think winters here really count.

 

[JC1]

Originally Posted By: bdcardinal

5W50 but I don't think winters here really count.

+1, but ran it during Canadian winters in my 98 Sienna. Had no issues.

 

[CharlieW618]

20 W 50 in a 87 Dodge D 100 318 for 25 years. Sold still running good.

 

[SR5]

GTX 20W-50, Edge 10W-60 and Penrite 20W-60 But my Australian winters don't count, they are fairly warm. The thinnest oil I have ever used in summer is the oil I am using right now, M1 5W30, my very first ILSAC oil. I know !!! .... Just call me Tig2 (meant as a compliment)

 

[BrocLuno]

20W-50 year round. SAE 30 year round. SAE 40 year round. Trop-Artic 50 Racing oil year round back in the day in clearanced motors

 

[53' Stude]

Valvoline Maxlife blend SM 10w40 in the "winter tank" 97' Bonneville of mine few years back when it was -12F for 4 days

 

[Shannow]

Shell Helix 25W-70. didn't get below -8C (about 20F)...nothing blew up. Time to full oil pressure didn't change. On the J Car engine, you could see the cam oil holes, and it "flowed" just fine.

 

[cb4017]

I used to run GTX 20-50 year round in an early VW bug. More recently M1 0w-40 European Formula in an 08 Jeep Wrangler.

 

[Nick1994]

Mobil 1 10w40 HM in the 1970 Beetle right now, it's had it for 19 months or so. Had MaxLife 10w40 in my 96' Chevy pickup with a 350 But this is Phoenix, it gets to 30 occasionally.

 

[eljefino]

20w50 in a $400 saturn in March with overnight lows in the teens. I got it on clearance and was using it as a flush oil as the previous stuff was tarry and nasty.

 

[s2krunner]

XW40 all year works here in TX expect my wife's Honda. I used 5w30 in Michigan winter.

 

[bigjl]

Probably 10w40 in various old school diesels. Both 1.9 XUD

 

[antonmnster]

15-50 M1 in my 1991 318is