Mickey,quote:
Originally posted by Mickey_M:
I can give you the short version of the differences:
...The 20W-50 motorcycle oil contains no VI improvers at all.
...The 20W-50 is more polar
...The detergent package is optimized for higher temperatures...
...Zinc and phosphorous levels will show up much higher...
...On the other hand, the 20W-50 is more expensive.
Apparently you haven't looked at any recent VOAs for M1 15W50 and M1 V-twin 20W50. The 20W50 has quite a bit more antiwear additives.quote:
Originally posted by Greg K:
Mickey,quote:
Originally posted by Mickey_M:
I can give you the short version of the differences:
...The 20W-50 motorcycle oil contains no VI improvers at all.
...The 20W-50 is more polar
...The detergent package is optimized for higher temperatures...
...Zinc and phosphorous levels will show up much higher...
...On the other hand, the 20W-50 is more expensive.
I'm not trying to start a war, but it seems to me that you are actually comparing M1 VT and 'normal' auto oils (normal being those outside of the nnW-50 viscosity ranges).
The VOAs for the two oils ( M1 EP and M1 VT) are darn near identical.
So, could you tell me:
- how EP and VT differ in VI modifiers and detergent?
- what do you mean by polarity?
Well, that may be but my above post includes the most recent VOAs on BITOG for the two products, both about 13 months old. I doubt that the oils have been reformulated (again) since 03/05 but it's not impossible.quote:
Originally posted by DNS:
Apparently you haven't looked at any recent VOAs for M1 15W50 and M1 V-twin 20W50. The 20W50 has quite a bit more antiwear additives.
note: the SUS@210 of 83.3 looks to be on the 40-50 weight border but not too much below where it started new (17.9cSt@100C), whereas the 105.5 is high in the 50 weight range but also just below where it started (19.9cSt@100C). See viscosity guide here.code:
15W-50 20W-50
EP V-Twin
@2,628m @4,000m
ALUMINIUM 4 5
CHROMIUM 0 1
IRON 15 14
COPPER 13 13
LEAD 3 2
TIN 1 1
MOLYBDENUM 73 74
NICKEL 0 0
MANGANESE 0 1
SILVER 0 0
TITANIUM 0 0
POTASSIUM 2 8
BORON 203 165
SILICON 9 9
SODIUM 5 6
CALCIUM 2794 2249
MAGNESIUM 60 29
PHOSPHORUS 1070 1162
ZINC 1324 1484
BARIUM 0 1
SUS @ 210*F 83.3 105.5
TBN 8.6 5.8