Do all brands really test against other brands?

[strombony]

I was recently skimming the Castrol website and reading how they advertise Castrol GTX in that it perfoms 57% better at preventing sludge than other brands. Then I read the more sensible stuff they had and how they described the best way to prevent sludge is to simply change your oil and not extend when you are within sever service.

What I want to know is, do they REALLY test their conventionals against Pennzoil, Valvoline and others? And, do you really think that GTX is 57% better than the other major brands?

As most here have stated, any SM oil is going to perform almost equally, so how does Castrol really substantiate this claim?

 

[firemachine69]

No.

 

[Bill in Utah]

So if GTX is 57% better at preventing sludge over other oils then what would be the number if Pennzoil cleans 15% of sludge left over from "other" conventional oils?

And then if more Crews of racing teams and Mechanics use Valvoline how dirty are their motors?

Oh... This new math

 

[strombony]

Bill in Utah..
Yes, I agree with you...it's all rediculous. All I'm wondering is, are they REALLY putting 5qts of pennzoil in a mother and Castrol GTX in the other and comparing both motors after running each?

 

[Big Jim]

As a car dealer once told me "it's just sales talk".

As an attorney once told me, it wouldn't pass the "laugh test". The "laugh test" is that if you can't say it without laughing you probably shouldn't say it in court.

Funny thing though, it won't pass the laugh test but it can be said in advertising.