Julian73
SILVER Star
Mobil1 'FS' oils are definitely full synthetic and on the shelf
Update: 5W-30 & Heavier Recommended RoTW (3 Viewers)
- Thread starter 04UZJ100
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
Thats not what a little birdie told me.
I get my Pennzoil UP at a local Auto Zone. They have in the back in 5 quart jugs, they don’t even keep it on the shelf.
bloc
SILVER Star
Last edited:
xeuxaz
SILVER Star
lol, just ordered 1 on eBay.
xeuxaz
SILVER Star
I am surprised you didn’t notice a quieter top end.. at the very least slightly higher oil pressure as well.
It is a perception thing right? That said, I should have looked at PSI before and after. It's currently at 1/4 on the scale.
Anyone run the 5W in colder temps, i.e. overnight in the mountains? Curious if I'm going to need to alternate oils seasonally.
bloc
SILVER Star
Does -10f count? If so mine did fine this past winter on a ski trip.
If I lived up there I’d consider the extra coin for 0w-30.
I've been running the 0W for years without issue, but this truck gets worked hard earning its keep in this part of the country. It can get really cold in the mountains in the winter, but only occasionally unless we're talking places like Gunnison.
I've considered swapping in the fall/spring, winter vs. summer, that kind of thing. Kind of like actual snow tires. Throw out the 5k intervals.
What think?
bloc
SILVER Star
I'd just stick with what you're running. (see edit) You could save a little money with 5w-30 but IMO you will get enough cold starts that the lower cold viscosity could make a tangible difference in wear over the long term.
For me the truly cold starts will be in the single digits per year. But it didn't seem to slow cranking and built pressure quickly when asked.
Edit: do you mean 0-20 or 0-30? Even in the cold I'd run 5w-30 over 0-20, but when 0-30 is an option and living in the mountains? Best of both worlds.
That's my thought. Hence alternate in this climate
bloc
SILVER Star
Or just run 0w-30 year round and no need to switch.
I’m running Pennzoil Platinum Euro 0W-40 in mine right now, mostly cause I had 8 quarts left over from previous vehicles and wanted to use it up
Unless I supercharged the truck I will probably move to 10w-30 in the summer and then blend some 0W-20 I have left over with 5w-30 in the winter. My truck rarely ever truly cold starts since it sits in a garage and my wife and I work from home. The coldest it would typically start is ~35F
Unless I supercharged the truck I will probably move to 10w-30 in the summer and then blend some 0W-20 I have left over with 5w-30 in the winter. My truck rarely ever truly cold starts since it sits in a garage and my wife and I work from home. The coldest it would typically start is ~35F
Last edited:
I run 5w30 year round in Alaska, Washington, and Arizona. The only oil weight I run. I have since purchased new in 2015.
It started right up on -40F day last winter at our place in Island Park, ID.
I’m not the smartest guy here but I’ve always heard and read that mixing different motor oil weights is ill advised.
If your jumping ship on the 0W20 then 5w30 or 0w30 would be the standard move. Someone on here had tell of his truck running 40 before he acquired it and the switch back to 20 was accompanied by lots of top end chatter. I believe it’s on the big oil weight thread.
For absolutely no scientifically proven reason and just because I can, I change oil twice a year here in Michigan and run 5-30 summer and 0-30 winter. I put almost exactly 10K miles per year on the LC so it works out to 5K mile OCI.
