Straight 50 weight oil

[Krunk_Kracker]

In this thread: Grumpy Old Men

[Big T]

In this thread: Grumpy Old Men

KK

It's what JeepRusty does - starts something outrageous

I'll bet he never posts in this thread again

[7981GS]

As there are no straight 50W quarts of synthetic oil to be found, yet,
in the Summer when it averages 85-105, I will add one quart of Valvoline VR-1 Racing 50Wt. with 3.5 quarts of synthetic to make it closer to a 30W-50 oil.

Daniel

[Steve]

As there are no straight 50W quarts of synthetic oil to be found, yet,
in the Summer when it averages 85-105, I will add one quart of Valvoline VR-1 Racing 50Wt. with 3.5 quarts of synthetic to make it closer to a 30W-50 oil.

Daniel

And the advantage of that would be ...???

In case nobody has caught on yet, the first number, the one with the "w" after it, is the approximate viscosity when the engine is cold.
The lower the number, the easier it will flow. Why would you want to start with a 30w oil, especially when the manufacturer recommends a 10w?
Personally, I like a thinner oil when cold, so it flows easier and starts lubricating the cam bearings sooner.
The fact that my preferred oil is also a "synthetic" is just icing on the cake, but I use 5w-40 Rotella Synthetic.

Using thicker oil might increase your oil pressure, but please remember that higher pressure does not necessarily mean that you have more oil flowing.
You can plug the oil gallery just downstream from a gauge and see all kinds of pressure, but ZERO flow.

.

[7981GS]

At 85 degrees+, check your owners manual.

Daniel

[Nessism]

Yes, as Steve says, the W number indicates cold temp flowability; 10W flows easier than 20W, etc. The highest is 30W. As oils get thicker than this there is no real point of testing the cold flowability since that stuff don't flow for crap.

The second number is the viscosity rating at 100 C* - the higher the thicker of course.

So 20W-50 and straight 50 will have the same high temperature thickness, only the 20W-50 will flow decently at low temps but the 50 won't. Personally, I'm not aware of any advantage in using straight weight oil, or an oil with a higher W number.

Straight weight oils have less additives in them which some people think is better under some situations. A number of years ago this may have had some value but that's pretty questionable these days for a road going vehicle.

[JEEPRUSTY]

Sure he does. I can't read his postings.



.

Jesus Christ "GS Resources Superstar"

[JEEPRUSTY]

Yes, as Steve says, the W number indicates cold temp flowability; 10W flows easier than 20W, etc. The highest is 30W. As oils get thicker than this there is no real point of testing the cold flowability since that stuff don't flow for crap.

The second number is the viscosity rating at 100 C* - the higher the thicker of course.

So 20W-50 and straight 50 will have the same high temperature thickness, only the 20W-50 will flow decently at low temps but the 50 won't. Personally, I'm not aware of any advantage in using straight weight oil, or an oil with a higher W number.

Straight weight oils have less additives in them which some people think is better under some situations. A number of years ago this may have had some value but that's pretty questionable these days for a road going vehicle.

This is not true, as I understand it from a perspective of synthetics. It seems the inverse is true. Regardless my question was sincere and does not warrant a fake smiley and a condescending suoerstar response.

[tkent02]

I think, on a GS with it's roller bearings, you could run anything and everything and not ever have an oil related problem. It just isn't critical on these engines, in normal use. 50w, OK, 10w would probably be fine too. Anything in between, gravy. Actually real gravy would probably work for a while too. Why I bet even peanut butter would work.

[Nessism]

This is not true, as I understand it from a perspective of synthetics. It seems the inverse is true.

I believe you are wrong.

[Steve]

At 85 degrees+, check your owners manual.

Daniel

I did.

It doesn't say to stop using 10w-40, but it does allow 20w-50.

I think, on a GS with it's roller bearings, you could run anything and everything and not ever have an oil related problem. It just isn't critical on these engines, in normal use. 50w, OK, 10w would probably be fine too. Anything in between, gravy. Actually real gravy would probably work for a while too. Why I bet even peanut butter would work.

You know, if it were ALL roller bearings, I could go along with that, but there are those pesky CAM BEARINGS that are not even babbit inserts, they are simply machined aluminum.

.

[simon kuether]

Can I run a multigrade vegemite ?

Cheers , Simon .

[Steve]

Can I run a multigrade vegemite ?

Cheers , Simon .

Only with the occasional biscuit.

.

[cowboyup3371]

Not a biscuit Steve as that's a cookie. Maybe with bread or buns

[tkent02]

Not a biscuit Steve as that's a cookie. Maybe with bread or buns

But those are baps.