best synthetic oil

Status
Not open for further replies.
Originally Posted By: chevrofreak
Originally Posted By: sprintman
What an absolute load of [censored]! North Americans seem to have this idea that going from say 30W to 40W means going from olive oil to bhoney. This is absolute cr#p. I ran 25W70 for over 5 years in the coldest part of Australia. I could go and run 40W70 without a problem in an engine North Americans run 5W70, and still no problems. You guys have serious viscosity phobia, get over it.


I don't think that 5W-70 is even available here.

I think it is the Australians who have the viscosity phobia. You are afraid of running anything that flows faster than peanut butter.


Who the [censored] would put 5-70 wt in an engine these days! This I cannot comprehend and I have never seen such an oil either. I have run straight 70 weight in a car before but I've never seen 5-70. My god! What a spread!

On a trip to Tuscon,AZ from Fullerton, CA 30 nyears ago I made it from Fullerton to Tuscon in 6 hrs flat and stopped for lunch for 45 minutes along the way.

I was driving a '68 AMX with a 390 in it. Unfortunately the motor went bad on the way to Tuscon and started using oil like there was no tommorrow.

I went to 40 Wt, then 50 WT and then 70 WT just to keep the oil pressure up to 5 or 10 psi at 85 mph on the way back. Fresh clean oil was dripping from both tailpipes all the way back to Fullerton.

So for ALL you "thin" guy's out there. Remember. there is something to be said for a spare case of 70 WT in the trunk. I rebuilt the motor for cheap when I got back and beat it for another 2 years before I threw a rod and blew the T-5 all on the same day.

Disclaimer: It was a long time ago and it may have been 60WT but I know it was heavier than 50WT
 
Originally Posted By: Trvlr500
54dp43.jpg


As we ALL know the off-road handling of Cadillacs is legendary


Man that`s a BEAUTIFUL car!!!!!!!!!!!!!!
 
Hi,
well what a Thread. Much of it because of a challenge to Pablo's substantially incorrect comment of:
"Please don't use 20W-50 in your rig. Your wear will actually go up,...................."

OVERK1LL - In the 1960s when I worked for Chevron-Caltex in Copenhagen in Denmark we "looked after" a fleet of Caddies (14) and some Studebaker Hawks (6)! (We tried some special lubricant brews too). Some Caddies were LWB versions. It was at the time the largest Fleet of Caddies in Europe. They were all chauffeur driven hire cars and the prime customers were Americans who flew in and were then driven around Europe for extended periods. Mileages were put up very quickly too and the cars were very very reliable. The Company was Danish and it also serviced the US forces in Germany


These cars all ran on 10W-30 Caltex lubricants

Delvac 1 5W-40 does fit well in many GM V8s - my youngest Son has some hot GM V8 engines and swears by it! Probably at them at times too.........

Pablo - Thank you for the temperature ranges - a great effort and not the Am.... work anywhere of note! If you ever visit us here we would be delighted to show you some extremes that are not on your chart! But at least you mentioned Stanthorpe on it!
 
Last edited:
Originally Posted By: aquariuscsm
Originally Posted By: Trvlr500
54dp43.jpg


As we ALL know the off-road handling of Cadillacs is legendary


Man that`s a BEAUTIFUL car!!!!!!!!!!!!!!


Thank you, Aquriuscsm,
 
My comment was very much correct. If you use 20W-50 in a 2007 GMC in Minnesota, in the winter, the relative wear will be greater than with a 5W-30. Why Doug cannot understand this, I just don't know.

PS BTW Doug if you are saying Australia's own records are not correct, please post otherwise. Not trying to be rude, but once again, you simply cannot admit to being incorrect. North American and USA in particular, are much colder in winter than Australia. I prove it and you attempt to discredit the facts: "some extremes that are not on your chart!"
 
Originally Posted By: Doug Hillary
Hi,
well what a Thread. Much of it because of a challenge to Pablo's substantially incorrect comment of:
"Please don't use 20W-50 in your rig. Your wear will actually go up,...................."

OVERK1LL - In the 1960s when I worked for Chevron-Caltex in Copenhagen in Denmark we "looked after" a fleet of Caddies (14) and some Studebaker Hawks (6)! (We tried some special lubricant brews too). Some Caddies were LWB versions. It was at the time the largest Fleet of Caddies in Europe. They were all chauffeur driven hire cars and the prime customers were Americans who flew in and were then driven around Europe for extended periods. Mileages were put up very quickly too and the cars were very very reliable. The Company was Danish and it also serviced the US forces in Germany


These cars all ran on 10W-30 Caltex lubricants

Delvac 1 5W-40 does fit well in many GM V8s - my youngest Son has some hot GM V8 engines and swears by it! Probably at them at times too.........

Pablo - Thank you for the temperature ranges - a great effort and not the Am.... work anywhere of note! If you ever visit us here we would be delighted to show you some extremes that are not on your chart! But at least you mentioned Stanthorpe on it!


Ah, yes, Doug Hillary,

The Caddy;s of the elites you serviced are probably the very people who push this environmental fanaticism which will soon be the demise of America's favorite hobby. Driving cars at high speed across wide open spaces. Like Nevada. However, it is worth trillion's in new global taxes to them.

Oil is like the bar scene. The thicks and the thins have their place!
 
Originally Posted By: Pablo
My comment was very much correct. If you use 20W-50 in a 2007 GMC in Minnesota, in the winter, the relative wear will be greater than with a 5W-30. Why Doug cannot understand this, I just don't know.

PS BTW Doug if you are saying Australia's own records are not correct, please post otherwise. Not trying to be rude, but once again, you simply cannot admit to being incorrect. North American and USA in particular, are much colder in winter than Australia. I prove it and you attempt to discredit the facts: "some extremes that are not on your chart!"


Particularly Canada actually
wink.gif
 
Originally Posted By: Pablo
I didn't want to be too extreme. USA alone is way colder than Australia in the winter.


Winnipeg! LMAO!!!!!!!!
 
One question regarding with viscosity and how the oil is built regarding 'dusty conditions' and not hot cold temp.

Would a higher viscosity oil protect better than a lower viscosity oil in dusty conditions? Thick vs Thin debate.
 
Originally Posted By: Mamala Bay
One question regarding with viscosity and how the oil is built regarding 'dusty conditions' and not hot cold temp.

Would a higher viscosity oil protect better than a lower viscosity oil in dusty conditions? Thick vs Thin debate.


I've not seen a study on this....I thought there was an SAE paper, but a quick search didn't turn anything up. I suppose an oil on the higher vis side may help, but that's just speculation on my part, by reasoning that a better film strength oil provides just a hair more margin from a greater range of particle sizes.
 
Originally Posted By: Mamala Bay
One question regarding with viscosity and how the oil is built regarding 'dusty conditions' and not hot cold temp.

Would a higher viscosity oil protect better than a lower viscosity oil in dusty conditions? Thick vs Thin debate.


I don't have any scientific data to back up my opinion but I would think yes. If the air filter isn't doing it's job and dust is actually getting into the oil. With water for oil the dust would have a better chance of causing wear inside the engine.

This wouldn't be a problem, of course, if the air filter is maintained properly and the engine is sealed up as they all are from the factory. There is also the oil filter which would remove it as long as it is maintained properly.

In a nutshell, I can't see how dusty conditions would require a heavier weight oil if all filters are maintained properly. It would be a moot point. The ambient tempurature, the engine and driving habits have much more to do with engine oil weight than dusty conditions would.
 
Hi,
Pablo - I don't need to admit being wrong. I live here and what I printed earlier about our temperatures is correct.

However please understand that much of inland Australia does not have weather stations every few kms. Around here for instance we often get temperatures nearing 50C and it is the same around the Gatton area west of Brisbane where I have some land. This is especially so West of our Great Dividing Range heading West and North - and as Shannow well knows too! The prevailing temperature ranges for these areas never show the extremes as they are simply not recorded

I once ran my Ford Explorer V6 (I owned at the time) for about four or five hours at around 100mph in 50C temperatures (for Ozzies - from Roma north up into the Gulf area)

But this is all so pointless.

The fact is that a 20W-50 lubricant will not show an increase in wear as you indicated - and as you have just said:
"If you use 20W-50 in a 2007 GMC in Minnesota, in the winter, the relative wear will be greater than with a 5W-30."

These are simply your comments and are made without you being able to substantiate it. At worst the engine will not perform optimally!

The manufacturer's Approved and Listed correct viscosity lubricant should be used according to the prevailing ambient - for the best perfomance from the engine!
 
Originally Posted By: Doug Hillary


These are simply your comments and are made without you being able to substantiate it. At worst the engine will not perform optimally!


Wouldn't you want your engine to perform optimally? Please let me know if I interpreted that statement incorrectly.
 
Originally Posted By: Doug Hillary


The fact is that a 20W-50 lubricant will not show an increase in wear as you indicated - and as you have just said:
"If you use 20W-50 in a 2007 GMC in Minnesota, in the winter, the relative wear will be greater than with a 5W-30."

These are simply your comments and are made without you being able to substantiate it. At worst the engine will not perform optimally!

The manufacturer's Approved and Listed correct viscosity lubricant should be used according to the prevailing ambient - for the best perfomance from the engine!



Please help me understand this. In a MN winter where temps can reach -20*F or colder a 20W50 will not produce higher wear #'s than a 5W30 under the same conditions? I'm not getting it? Especially if the car is driven short distances, and has many warm up cycles? I'm just trying to understand, and not start any problems. If that's the case then why bother with 0W-xx 5W-xx etc in extreme cold conditions?

Frank D
 
Hi,
Trvir500 - In "dusty conditions" - (extremes) most wear from the entry of dust is done at the ring/piston/wall area. Oil viscosity plays a minimal role here in this case

In very dusty operations it is common to use a centrifugal pre-cleaner than spins much of the dust out first. Then the best filtration possible takes over according the type/quality ofthe element used. Oil bath after-cleaners work very well in this regard too depending on the application

Rapid wear can occur when intake tract sealing is insufficient. Two stoke diesels can wear out an engine in an hour or two depending on the magnitude of the lack of sealing and the type of "dust". In these cases the bottom end of the engine is rarely compromised from a wear viewpoint regardless of the lubricant's viscosity
 
Originally Posted By: Doug Hillary


The fact is that a 20W-50 lubricant will not show an increase in wear as you indicated - and as you have just said:
"If you use 20W-50 in a 2007 GMC in Minnesota, in the winter, the relative wear will be greater than with a 5W-30."

These are simply your comments and are made without you being able to substantiate it. At worst the engine will not perform optimally!



And of course, an engine not being able to actually pump the 20W-50 oil would not be performing optimally and would have more wear (if it turns over and actually starts) than a 5W-30.
 
Hi,
Riptide, demarpaint - please do not confuse the issues we have covered

Optimal performance from the engine depends on using the correct lubricant for the prevailing ambient temperature. This is especially so with very sophisticated valve train actuators, injector operation (in some cases) and the likes

Using a more viscous lubricant will certainly impede the performance of the engine in a number of ways - slower to spin over, and etc but this does not necessarily relate to more engine wear - it is mostly performance related

You probably have a much greater risk of excessive and quite specific engine wear in some engine families by using a less viscous lubricant than that specified by the manufacturer

Personally I will not deviate from the lubricant ranges specified by the engine's manufacturer

I have not said anywhere in here that the OP should use a 20W-50 lubricant - I have NOT suggested what they should use - it should be IMO exactly waht the manufacturer recommends.

I simply challanged Pablo's blanket and incorrect statment about wear rates!

You can see below the lubricants I use in my vehicles and in temperatures ranging from -10C to 50C. I always use the lowest viscosity according to the application and have done so for decades.
I was the first serious user of German Castrol Formula SLX 0W-30 in Austalia in 1996 - in consort with Castrol!
 
Status
Not open for further replies.

Similar threads

R
Best oil for 3.8 V8 twin turbo Ferrari engine
2
Replies
37
Views
1K
mark pruett
BrokenAudiTT
  • Locked
GM L87 Engine recall 0w20 to 0w40
Replies
8
Views
4K
BrokenAudiTT
stchman
3.6L 2018 GMC Canyon Oil Change Interval
Replies
16
Views
733
stchman
Jeffrey Behr
AGAIN...what's the 'best' engine oil for me?
2 3 4
Replies
61
Views
1K
Rand
W
Feeling the difference, switching to Synthetic (PAO Group IV)
Replies
9
Views
1K
WiredForStereo
Back
Top Bottom