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#4496502 - 08/23/17 09:33 PM Castrol GTX 20w50 High Mileage Semi-Synthetic
BigJohn Offline


Registered: 06/21/08
Posts: 884
Loc: Colorado
I am curious how this oil would do in air cooled bikes with some mileage on them?????

I should state....shared sump, which probably means a lot of quick shearing.

Castrol GTX 20w50 High Mileage Semi-Synthetic

Whats the general opinion of this oil??????


I am considering using this in my '04 BMW 1150 GS and in my wife's TTR230.

.......


Edited by BigJohn (08/23/17 09:34 PM)
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#4496570 - 08/24/17 12:11 AM Re: Castrol GTX 20w50 High Mileage Semi-Synthetic [Re: BigJohn]
ammolab Offline


Registered: 01/16/06
Posts: 995
Loc: Ruidoso, NM USA
Would do good in the BMW, but no gears in that sump.
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#4496601 - 08/24/17 03:22 AM Re: Castrol GTX 20w50 High Mileage Semi-Synthetic [Re: BigJohn]
Kamele0N Offline


Registered: 02/09/15
Posts: 2038
Loc: Slovenia
When I looked in VOA subforum....I was surprised how low on ZDDP are modern 20w50 oils....

I would expect that as sae50 they had ton of it...but they all had around 700-800 ppm...even Harley Davidson brand
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#4496662 - 08/24/17 06:38 AM Re: Castrol GTX 20w50 High Mileage Semi-Synthetic [Re: BigJohn]
alarmguy Offline


Registered: 07/10/12
Posts: 2147
Loc: South Carolina
I think you would be fine, dont worry about shearing, they all do in shared sumps and taken into account.

Im experimenting right now with Valvoline MAXLIFE 20w50 semi. I think Castrol is a good runner up.
Curious to see how it matches up with my go to favorite - Mystik 15w50 that I have been using the last 2 years in my non shared sump Road King..


Edited by alarmguy (08/24/17 06:39 AM)
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#4496857 - 08/24/17 10:24 AM Re: Castrol GTX 20w50 High Mileage Semi-Synthetic [Re: Kamele0N]
MotoTribologist Offline


Registered: 02/03/16
Posts: 562
Loc: NJ, USA
Originally Posted By: Kamele0N
When I looked in VOA subforum....I was surprised how low on ZDDP are modern 20w50 oils....

I would expect that as sae50 they had ton of it...but they all had around 700-800 ppm...even Harley Davidson brand

More than likely, the blender will use a package of additives that will meet the specifications for all viscosity grades. So it'll meet the restrictions on the lower viscosity grades and they don't spend the money to top treat the higher grades with extra additives even though they are allowed to. It is all economics at that point and making as much/as cheap/as fast as possible.

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#4496863 - 08/24/17 10:32 AM Re: Castrol GTX 20w50 High Mileage Semi-Synthetic [Re: Kamele0N]
jeff78 Offline


Registered: 06/06/17
Posts: 129
Loc: New York
Originally Posted By: Kamele0N
When I looked in VOA subforum....I was surprised how low on ZDDP are modern 20w50 oils....

I would expect that as sae50 they had ton of it...but they all had around 700-800 ppm...even Harley Davidson brand


If you want high ZDDP in a 50 grade, try Valvoline VR1, Valvoline motorcycle oil, or Mobil 1 15W-50, they've all got over 1000ppm. For overkill, there's always Red Line with over 2000ppm.

I'm sure there are others as well, just a matter of finding them.

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#4496877 - 08/24/17 10:54 AM Re: Castrol GTX 20w50 High Mileage Semi-Synthetic [Re: BigJohn]
Bzab32 Offline


Registered: 07/09/15
Posts: 106
Loc: WI
I use Castrol 20-50 in my air cooled triumph works great.
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