Thickest or thinnest oil you have used in winter

[53' Stude]

For me it would have been M1 10w40 HM SL rated. Thinnest was 0w20. Both in my old Camry

How about you folks?

 

[Bailes1992]

Temperatures don't get too low over here in the UK. I think -10°c (14°f) is probably the lowest we see every few years. Especially near to the coast where I live. Some places further North of the country, Scotland etc will get a bit colder.

I think the thickest in a daily driver I've gone over winter was Morris Lubricants HD4 15w40 in my Wifes 2016 Dacia Duster 1.5DCi 4WD. Was absolutely fine with no issues. Still wish we never got rid of that car! What a mistake that turned out to be.

Once my current stock dries up I'm going to buy 40 litres of Mobil Delvac MX ESP 15w40 which I plan to run in everything for the next 12 months or so, or until I run out and buy something else. I think it's the same product as the Mobil Delvac1 Extreme you get over there?

 

[thastinger]

Straight 30W Rotella T1 in a 49 Farmall C...good thing she is converted to 12V but still has a 6V starter.

 

[Rmay635703]

10w30 full synthetic does work all winter, even though it gets to -20F just requires an easy warm up period

 

[demarpaint]

10W40 back in the day, and 0W20. Now 0W30 or 5W30 in both Jeeps, and 5W40 in my van.

 

[RooflessVW]

I ran PYB 20W-50 year round in everything in Germany. VWs, Audis, BMWs, Nissans...

 

[Propflux01]

10w-40 in the 70’s and 80’s. 10w-30 in the 90,s and 2k’s 5w-30 since 2008.

(of course that doesn’t count the 20w-50 in my Harley).

 

[Rand]

15w40 in a deere 316 tractor. turned over slow at 30f.

 

[RTexasF]

GTX 20W50, north Alabama winters for 10 years. '79 Chevy Caprice 305 ci.

 

[deven]

Thickest is 5w40 and thinnest is 0w10

 

[tyman]

0W20 and 5w30

 

[joekingcorvette]

I use 0W20 in my Honda, Jeep, and Ford truck most of the time. The Corvette takes a little thicker oil 10W30. The 0W20 works great for me year round and is my go to oil. Any brand but I always use full synthetic and I don't use synthetic blends because the price is about the same. Lately I just go to Costco and grab the Kirkland brand. Actually I used Pennzoil Ultra Platinum full synthetic in my Honda on Monday.

 

[aquariuscsm]

Castrol GTX, Royal Purple, and Valvoline white bottle, all in 20W50, in my Olds Toronado and 300ZX.

 

[JavierH19]

20w-50 in a Texas 33f winter. So not really winter depending on who you ask.

 

[addyguy]

I’ve had two vehicles lock up and not start close to -30C with 10W-30 oil in them; including M1 EP 10W-30. These vehicles both had good batteries in them.
That’s why I think people who say ‘I’ve started a car at -40 with 10W-40 in it’ are exaggerating about the temperature - 10W DOES NOT work below -25C.

 

[oggb]

Rotella 15w-40 in my Prius because I was curious. Caused slow/harsh cold starts and noticeably lower MPG beginning around 20F. I'll still use it in the spring/summer if it's all I have sitting around.

 

[mahanddeem]

PUP is a good thin-for-gade oil for winters. Others might be more suitable for hotter weather for same grade.

 

[wpod]

We need to add to our posts, the winter temps and why do we chose the W viscosity. I use a 0w 0r 5W - 30 or 40 all year because I do more or less once a year oil changes and where ever I have lived the oil viscosity spread allows all year use of the oil all year long and allows the engine to out live the ownership of my vehicles. Where I live , Caldwell Idaho, it gets into the low teens some times to zero degrees F. The highs are a bit over 100* F during the hot spells.

 

[Hermann]

Have used 0W-16 and 20w-50 on the upper end.

 

[Reggaemon]

Used SAE 30 year round for my dd Porsche in the 70's.