Motor oil - What viscosity do you use?

[Jeepguyp]

Rotella T6 5w40 synthetic in EVERYTHING.

I don't worry too much about oil pressure, I have the relief valve set at only 45 PSI on my Gladiator. I am more concerned about how fast I get pressure (circulation) on cold starts, how soon it drops to the regulated pressure when warm, and how well it maintains regulated pressure.

Viscosity is RESISTANCE TO FLOW, more is not better. Also since the oil pressure tap on our engines is typically upstream of any bearings, that high pressure may be indicating that oil isn't getting to where it's needed.

[Jeepguyp]

Glitch

weird.... I posted above WEEKS AGO and it says (on the forum header) I did it TODAY..... glitch in the machine

[18cherokee]

just switched to 10w50 semi synthetic (also an lpg/propane special blend) on my rebuilt engine. also use a valve saver system.

[Jeepguyp]

valve saver

Valve saver for the LPG? whats the system? and what kinda oil has 10-50?

[SD_RED]

Z-Rod

Amsoil Z-Rod 10W30 in a 81 waggy 360 daily driver, central Texas. Very high zinc content.

Here's the link:

http://www.amsoil.com/storefront/zrt.aspx

[CJ5]

I use Valvoline SAE30, always have. Ihave used it in all my motors, old and new and never had any problems.

[Great Pharoah]

NAPA 15-50 Synthetic

I changed from motorcraft 10w 30 to NAPA 15w50 full synthetic. Seems to work good I don't see any leaks. I Don't know who the vendor is but it's not one I'm familar with. but as long as it works, who cares.

[svining]

In the shop manual

It says that our Northern friends should use 20 w Oil in 0 degree temps. So I was musing about using 5-20 Mobil 1, for better milage. Now I know at 0 degrees you need the Oil thin. But after your motor is warm you still got 20 weight oil in there. So I don't see why some are so worried about thin oil.

Gets where it needs to, fast and improves milage. I haven't heard, but I'm no expert, that motors in the Northern tier, wear out fast because they use thin Oil. Anybody in Minot ND got their ears on today. Do your motors wear out fast in Canada, if your not out shoveling snow give a chime!

I changed from motorcraft 10w 30 to NAPA 15w50 full synthetic. Seems to work good I don't see any leaks. I Don't know who the vendor is but it's not one I'm familar with. but as long as it works, who cares.

[18cherokee]

Valve saver for the LPG? whats the system? and what kinda oil has 10-50?

Valve Saver

10w50 oil

[svining]

I saw it today!!

Walmart has Mobil 1, 0-30 weight, improved milage formulation, I hoping to get 20 mpg after the next Oil change

Valve Saver

10w50 oil

[247pia]

Walmart has Mobil 1, 0-30 weight, improved milage formulation, I hoping to get 20 mpg after the next Oil change

[Rich88]

There's a conspiracy: They're hiding the 0 friction, lifetime oil. (Along with the 100 mpg carbs)

[KJ Ryu]

Mobile1 5w-30 in everything I own, except my Ski-doo. It gets XPS Syn blend. That may change when the warranty is up.

My Liberty gets 21.5mpg on the highway with a 3" lift and 31" tires (stock is about 28.9") and no gear change. I attribute most of that to the Mobile1. I kept track, using several oils through a few changes before trying another. Have yet to try Amsoil, though. Oh, Royal Purple syn diff oil makes a lot of difference, too!

[svining]

As usual Rich!!

I guess you didn't get the memo on the special chip that doubles horsepower and triples milage for $29.95

Mobile1 5w-30 in everything I own, except my Ski-doo. It gets XPS Syn blend. That may change when the warranty is up.

My Liberty gets 21.5mpg on the highway with a 3" lift and 31" tires (stock is about 28.9") and no gear change. I attribute most of that to the Mobile1. I kept track, using several oils through a few changes before trying another. Have yet to try Amsoil, though. Oh, Royal Purple syn diff oil makes a lot of difference, too!

[KJ Ryu]

I guess you didn't get the memo on the special chip that doubles horsepower and triples milage for $29.95

I did but it went to File 13. I base my results on my own research. YMMV!!!

HP doesn't seem to have gone up much but, I've never dyno'd it or anything. It will git when you gun it, tho!