Multi-grade or straight weight?
- Thread starter JonS
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Huh??
Yes Schmoe, LL is a HDEO of the same level as Delvac, Delo, and Rotella.
It meets all the same domestic and foreign specifications/approvals...
It meets all the same domestic and foreign specifications/approvals...
One more satisfied customer...
Seriously, as I've mentioned before, I just wish more people would give these oils (HDEO 15w40's) a shot before dismissing them...
Got another question. Looks like I probably won't be boating too much the remainder of the summer (new baby and no time). Engine may have 8 hours on it when put up for the winter. Since the oil is still looking clean and good, think I can get away with leaving this oil in until next year? Notice my location...not a lot of snow and ice down here during the winter. Boat will be stored indoors, unheated. Now the outdrive, I'll change it regardless, but I just have a feeling that the lack of use on this oil, it should be OK. It was fresh oil at the start of this years' season.
thanks.
thanks.
Most people would not have a problem with it.
I would change it just because it is simple and cheap. You're right, 8 hours is nothing to worry about. Do you have to drain the block and refill with anti-freeze in Oklahoma? How about fogging the carb?
I would change it just because it is simple and cheap. You're right, 8 hours is nothing to worry about. Do you have to drain the block and refill with anti-freeze in Oklahoma? How about fogging the carb?
I'll still do the "regular" stuff, fog the engine, fill it up with gas and stabile, drain the outdrive, drain the engine block and put some antifreeze in it, grease all inserts, pull battery, jack up the trailer, lower outdrive, etc. etc., it's just the engine oil. I'm not too lazy or anything, just hate to waste this oil. I've seen what this stuff can do and I just hate to waste money on it.
I just used the Viscosity calculator and found out the straigh 30w is thinner at 40f than 15w40. This would make it better in cold temps - right? Temps around 30f-40f. With no viscosity improvers in the straight weight oils, it will leave no deposits, sludge, or varnish. and hold better pressure because it is more stable.
I used
http://www.geocities.com/CapeCanaveral/3655/VI.html
on Delvac S1300 15w40 and Delvas 1330 straight 30 weight and confirmed your observation.
I wonder if modern 30 weights are better at cold temps that old 30 weights were?
The VI on Delvac 1300 30 weight is 117. A Pennzoil straight HD 30 has a VI of 105. It would be essentially the same as S1300 15w40 at 5C = 41F.
It looks like your results will depend on which brand of oil you use for your comparison.
Still, an interesting find, I never would have guessed that a straight 30 would be less visous than a 15w40, even if only in some brands.
This is a reason to not go by the manual. Because since 1992 (when my engine was made) multi-grades were not that good. I called PCM this afternoon, and he said i can use a multi-grade in my 1992 5.0 liter Ford v-8.
I said "what viscosity" and he told me a 10w30 or a 15w40 or 20w-40. He said not 20w-50 because it it way too thick. So, new technology overrides the owners manual?
I said "what viscosity" and he told me a 10w30 or a 15w40 or 20w-40. He said not 20w-50 because it it way too thick. So, new technology overrides the owners manual?
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