Why do you need 5W-50 if 10W-40 exists?

[HangerHarley]

Originally Posted By: simple_gifts
Quote:

My gasoline powered emergency generator calls for synthetic 5w-50. Usually Castrol Syntec 5w-50 is the only oil I can find. I'll have to keep my eyes open for other brands.


Redline makes a 5w-50


I was actually thinking of this since they say its thicker than their 15W-50. WOW!? Really?

Heard Redline "Leaves a weird velvety coating on parts" but cleans great.

I thought about continuing to use a 5W-50 on my car MANY a time. But i get lower OP with a thin 10W-40. And i might or might not ever seriously drive my car again. So im

*I Edited this out to stay OT* thank you d00df00d.

M1 5W-50 does not seem to be in America. Its either the Castrol or the Redline, correct? There is a 0W-50 Eneos, though... wow.

 

[Quattro Pete]

Originally Posted By: HangerHarley

M1 5W-50 does not seem to be in America.

Link

 

[porkchop01]

Originally Posted By: d00df00d
Originally Posted By: porkchop01
How many threads can you start in one day?

Interested to know how you felt this would be a valuable contribution.
Just wondering, thats all.

 

[d00df00d]

Originally Posted By: porkchop01
Originally Posted By: d00df00d
Originally Posted By: porkchop01
How many threads can you start in one day?

Interested to know how you felt this would be a valuable contribution.
Just wondering, thats all.

I suggest a PM, then.

 

[addyguy]

Originally Posted By: Doug Hillary
Hi,
addyguy - Just to clear up a few issues:

You said:
" Castrol was one of the first, if not THE first company, to develop a 10W-60 grade oil to help BMW with their engine problems;"

Not so - it was developed from Formula R 15W-50 that was introduced around 1976. BMW were not in that "mix" until later - Sauber-Mercedes used it in 1989 & 1990 to win the WSCC and LeMans in 1989. Porsche & BMW used this lubricant in this time. The deal was done with BMW sometime around 1999 when BP were sniffing around Castrol!

You said this:
" 'GC' was originally developed from Castrols 15W-50 grade racing oil;"

This is incorrect - Castrol Formula SLX 0W-30 (the original GC GC) was developed as a new breed of low (controlled) phosphorous, low cholorine oil in the early 1990s. It was castor based like Formula R was in the 1970s but it was a very different animal!

Castrol's 5W-50 lost Porsche Approval in 1999 - it was on that List as Syntec 5W-50, Super Racing and Syntron Extra. TWS Motorsport 10W-60 was also on the 1999 but lost Approval thereafter. The only 5W-50 lubricant on Porsche's Approved List after 1999 was and still is M1 5W-50

I could go a little further. Syntec was not introduced into OZ until the early/mid 2000s. This would have been a BP Marketing move I expect

And you are correct a 5W-50 viscosity makes very good sennse in some applications - just ask AMG!

addyguy - I hope this helps and I hope you are not offended by my Post



Doug - no offense taken at all. I knew I didn't have the facts quite right, thanks for setting the record straight.

I ust wanted to get across the message that Castrol is no stranger to large spread, high-viscosity oils...

 

[HangerHarley]

Originally Posted By: Quattro Pete
Originally Posted By: HangerHarley

M1 5W-50 does not seem to be in America.

Link


And just when i think Castrol Syntec wins by default.

Maybe it still does.