Gumout Multi-System Tune-Up Q&A

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#721546 - 07/01/05 09:00 AM Castrol GTX 20w50, 80 miles, 01YZ250F
sunruh Offline


Registered: 06/28/05
Posts: 1825
Loc: Cedar Park, TX
Castrol GTX 20w50 raced/ridden for 80 miles in a 2001 Yamaha YZ250F.
Testing done by Blackstone Labs.

INSOLUBLES: .2%
WATER: 0.0%
ANTIFREEZE: 0.0%
FUEL: < 0.5%
FLASHPOINT IN \xbaF: 430
SUS VISCOSITY @ 210 \xbaF: 70.6

ALUMINUM 24
CHROMIUM 1
IRON 5
COPPER 2
LEAD 213
TIN 0
MOLYBDENUM 135
NICKEL 1
MANGANESE 0
SILVER 0
TITANIUM 0
POTASSIUM 0
BORON 66
SILICON 9
SODIUM 3
CALCIUM 1885
MAGNESIUM 18
PHOSPHORUS 792
ZINC 929
BARIUM 0

the lead is because i use leaded fuel, not pump swill. the aluminum is from the pressure plate of my clutch.

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#721547 - 08/18/05 08:25 AM Re: Castrol GTX 20w50, 80 miles, 01YZ250F
Killer-B Offline


Registered: 06/27/05
Posts: 55
Loc: Memphis,TN.
Thanks dude

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#721548 - 08/18/05 09:14 AM Re: Castrol GTX 20w50, 80 miles, 01YZ250F
Mackelroy Offline


Registered: 12/03/04
Posts: 949
Loc: Florida /Texas
that oil seemed to do okay in comparison to your others and pretty cheap, did your clutch actuation point hold well?

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#721549 - 08/19/05 01:49 AM Re: Castrol GTX 20w50, 80 miles, 01YZ250F
sunruh Offline


Registered: 06/28/05
Posts: 1825
Loc: Cedar Park, TX
you can tell when the oil is worn out because the clutch starts grabbing. this oil is cheap enough to change very very frequent. it is also available darn near everywhere. it has a decent price vs performance rating.

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