Hmm dont flame me but...

Status
Not open for further replies.
quote:

Originally posted by Jimbo:
This SAE 20 thing is not new at all. American cars from the 1950's used it. The owners manual for my 1957 Chevy calls for 20W-20 as the primary recommendation. The heavier wieghts really became popular in the '70s due to the higher temperatures in emission-controlled engines.

Hmmm. I think 52~57 era Chevy's also calls for the 10w 30, and 5w 30(if avaible) for the yearlong... Also the '57 Studebaker calls those 5w 30 specs in the user manuals if memory serves right. It was interesting for me to discover that 5w 30 was avaible at the 50's. So analogy repeats: this might not be related with the clearances. In 50's o-rings may not be made of the molibdenum alloys so I expect a different mechanic design there. But 5w 30 viscosity seemingly very long lived. I wonder why...

One more thing is that my Chevy V6 clearly states not to use anything heavier than SAE 30. This one also indicated on the orig. service manuals. Be it the '52 Chevy or the an '89 V6 they say use 30w if you can't find a multiviscosity. So Straight 30 is better than a modern 10w 40? (One thing draws my attention is that all these engines have hydraulic pushrods.)

On the other side 70's European Ford manuals say OK for almost any viscosity from 5w 30 to 20w 50.
Appearantly there are engines that go to a ban for some viscosities and there are engines says OK for whatever the viscosity is. Here (in Turkey) 20w 50 called asa rule of thumb for the many years. (Unlike the popular idea it is not that hot down here. Last week it was still snowing.)


Jimbo, it is nice to meet a "collective mind"
 
quote:

You can make just about any engine work with 20wt oils by adjusting the oil pump output, the load supporting area of the bearings and going to roller rockers for the valvetrain.

So why has it taken this long for them to come around again? All we keep getting are people who say they used to run 20wt oils back during the Civil War, some say they won't protect in extreme conditions, some say it's CAFE and now your saying it's just a few minor adjustments and whalla? Look, no one really knows yet how these oils will hold up bc no one had done any long term analysis yet! Amsoil flat out told me they don't want to make a long drain 20wt. oil for sales reasons now and also bc they don't like the idea. TS, ou should inquire with you contancts at Amsoil about these issues to see where the trends are going and why?What will happen to Amsoil the day everyone uses a 20wt. oil? Exactly, they will have to make one. The question still hasn't been answered and that is, can the US start going for longer drains and be using these 20wt. fuel effeicient oils? Can you have it both ways? Oil companies will obviously loose some revenue, and Amsoil will struggle when other big oil companies start making long drain oils. Amsoil would then have to change it's buisness model....I don't see this happening too soon. Bottom line, we don't know yet.

[ April 19, 2003, 02:13 PM: Message edited by: buster ]
 
I dont know if this will help any or not but I have a book titled " The complete book of engines 1970 ".
This book has spec's of all the domestic engines for the year 1970.I'll post the recomended oil specs.

AMC 6 cyl 199/232:
SAE 20W-20,10W-30 or 10W-40.
--------------------------------------------------
AMC V8 304/360/390
SAE 20W-20,10W-30 or 10W-40.
--------------------------------------------------
Buick 350 V8
SAE 10W-30 ,20W or SAE20
--------------------------------------------------
Buick 455 V8
Same as Buick 350
--------------------------------------------------
Cadillac V8 472/500
SAE 20W or 10W-30
--------------------------------------------------
Chevy 4 and small 6 153/230
Sae 20W or 10W-30
--------------------------------------------------
Chevy / BOP big 6 250
Same as 4 and small 6
--------------------------------------------------
Chevy small V8 307/350/400
SAE 20W,10W-30, 10W-40 or 20W-40
--------------------------------------------------
Chevy Big V8 402/454
Same as small chevy
--------------------------------------------------
Dodge /Ply Slant 6
Sae 10W-30,20W-40 or 30Wt.
--------------------------------------------------
Dodge/Ply small V8 318/340
Same as Slant 6
--------------------------------------------------
Chrys/Dodge/Ply Big V8 383/440
Same as Slant 6 / Sm Blk V8
--------------------------------------------------
Dodge/Ply 426 Hemi
Same as other Mopar 6 and 8 cyl.
--------------------------------------------------
Ford/Merc small 6 170/250
SAE 20W-40
---------------------------------------------------
Ford Big 6 240
SAE 20W-40
---------------------------------------------------
Ford Small V8 302/Boss302/351W
SAE 20W-40 , SAE 30 from freezing to 90 degF and SAE 40 for above 90 deg F.
---------------------------------------------------
Ford Cleveland 351
Same as Small Ford V8
---------------------------------------------------
Ford Big V8 FE 390/428
Same as Ford small V8
--------------------------------------------------
Ford Big V8 429/460
SAE 20W-40
--------------------------------------------------
Jeep 4 134
10W-30 or 30 for temps above 90 deg F or 10w-30 or SAE 20 for 10-90 deg F temps.
---------------------------------------------------
Jeep V6 225
10W-20,20W or SAE 20.
--------------------------------------------------
Olds V8 350/455
20W,10W-30,10w-40 or 20W-40.
---------------------------------------------------
Pontiac V8 350-455
20W,10W-30,10W-40 ,20w-40 for all engines except:
Both Ram Air engines use SAE 30 or 10w-40 at all times.
--------------------------------------------------

Intresting history.
 
quote:

Originally posted by TooSlick:


New BMW oil specs for 2000-2003 engines:

Synthetic oil meeting BMW Longlife spec:

All temps: 0w-20/0w-30/0w-40/5w-20/5w-30/5w-40


Yes, but are there any 0W-20 oils meeting BMW's Longlife spec?

I only know of these oils meeting that spec:

BMW/Castrol 5W-30 High Performance Synthetic
BMW/Castrol 10W-60 for M3 cars
Mobil 1 0W-40 SuperSyn
Amsoil 10W-30
Kendall GT-1 Full Synthetic 5W-40
 
quote:

Originally posted by mikemc:

Fred, what part of Louisville? I lived briefly off Breckinridge while training for my company years ago and our division offices are on Linn Station Rd.


I am at the edge of Okolona and Hillview.
Nearing the end of my 3 year tour so I donty know where I will be next.

Fred...
smile.gif
 
Buster,

It's very obvious to me that the market is going to 0w-20/0w-30/0w-40 synthetics and 5w-20 petroleum oils. Amsoil has had their 5w-20 synthetic on the market for over two years, while Mobil is just coming out with theirs. I'm sure if they think the market demand is there, Amsoil will make a 25,000 mile/1 year, 0w-20 or 5w-20 formulation. I have sold very little of the Amsoil 5w-20 synthetic, so my impression is that most Ford/Honda owners are sticking with 5w-30 or 10w-30 for now. FWIW, I normally recommend the Amsoil or Mobil 1, 0w-30 synthetics for these applications.

When GM goes to 5w-20 across the board, then I think you'll see a big shift in what's on the shelves in terms of 5w-20 availability.

Ted
 
Status
Not open for further replies.
Back
Top