Patman
Staff member
I emailed Castrol asking for them to send me the specs on their oils under the SL formulation
and I got them in snail mail today. I'm not all that impressed. I will post the specs for their
10w30 oils (if anyone wants the other viscosities you can ask and I'll type them later, it's just
too much typing all at once)
Castrol GTX 10w30
Vis at 100c-10.7
VI-142
HTHS-3.1
Flash is 415F
Pour is -30c
Zinc-0.11%
Phos-0.10%
Castrol Syntec Blend 10w30
Vis at 100c-11.5
VI-138
HTHS-3.1
Flash is 415F
Pour is -33c
Zinc-0.11%
Phos-0.10%
Castrol High Mileage 10w30
Vis at 100c-12.0
VI-149
HTHS-3.3
Flash is 415F
Pour is -30c
Zinc-0.11%
Phos-0.10%
Castrol Syntec 10w30
Vis at 100c-10.0
VI-159
HTHS-3.1
Flash is 450F
Pour is -36c
Zinc-0.11%
Phos-0.09%
I find it especially sad how the Syntec Blend doesn't look any better than the regular GTX,
yet at a higher cost.
and I got them in snail mail today. I'm not all that impressed. I will post the specs for their
10w30 oils (if anyone wants the other viscosities you can ask and I'll type them later, it's just
too much typing all at once)
Castrol GTX 10w30
Vis at 100c-10.7
VI-142
HTHS-3.1
Flash is 415F
Pour is -30c
Zinc-0.11%
Phos-0.10%
Castrol Syntec Blend 10w30
Vis at 100c-11.5
VI-138
HTHS-3.1
Flash is 415F
Pour is -33c
Zinc-0.11%
Phos-0.10%
Castrol High Mileage 10w30
Vis at 100c-12.0
VI-149
HTHS-3.3
Flash is 415F
Pour is -30c
Zinc-0.11%
Phos-0.10%
Castrol Syntec 10w30
Vis at 100c-10.0
VI-159
HTHS-3.1
Flash is 450F
Pour is -36c
Zinc-0.11%
Phos-0.09%
I find it especially sad how the Syntec Blend doesn't look any better than the regular GTX,
yet at a higher cost.