Castrol GTX Start Up is it a blend?
- Thread starter Chimay
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JHZR2
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My truck always starts on the first cylinder, no matter how long it sits.
With castrol startup, the first cylinder fire is significantly faster than with other oils, both dino and syn, all 5w-30. The engine was cold soaked at ~55 F, and cranked faster than I have ever noticed before for a cold startup. It might as well have been a warm start.
JMH
With castrol startup, the first cylinder fire is significantly faster than with other oils, both dino and syn, all 5w-30. The engine was cold soaked at ~55 F, and cranked faster than I have ever noticed before for a cold startup. It might as well have been a warm start.
JMH
What puzzles me is why they make a "startup" 10w30. If you want good flow at startup, use 5w30!
It is nice it gets 25% ester. What would the other 75% be?
At 25% ester it probably is worth the going price, but I called and could not get them to tell me how much ester was in it. How did you find out the percentage?
I've been reading these various posts about Castrol Start-Up oil and noticed when I downloaded the MSDS sheets from Castrol's web site that the MSDS sheets for Start-Up and Syntec Blend are virtually identical. The ingredients listed in Section 2 looked to me to be the same...same oil and additive names, same CAS numbers, same exposure limits, and each ingredient has the same percentage of the total.
So, is that really say anything important about the similarity or differences between these two oils or not?
So, is that really say anything important about the similarity or differences between these two oils or not?
In a warmer climate I'd like to see a shootout between the Start-Up and the GTX High Mileage oil.
Betting the GTX HM will hold it's own . That oil has absolutely tremendous TBN retention
Betting the GTX HM will hold it's own . That oil has absolutely tremendous TBN retention
I've been reading these various posts about Castrol Start-Up oil and noticed when I downloaded the MSDS sheets from Castrol's web site that the MSDS sheets for Start-Up and Syntec Blend are virtually identical. The ingredients listed in Section 2 looked to me to be the same...same oil and additive names, same CAS numbers, same exposure limits, and each ingredient has the same percentage of the total.
the bottle is different
I'd consider using this oil ... if Castrol would be more up-front and honest about its composition.
No, I'm not holding my breath.
We all know that for cold flow-ability, you need to go with a synthetic base oil ... or at least a good blend.
My guess is Castrol has come up with a synthetic blend ... but don't want to call it such because of all of the misinformation "out there" about synthetics causing leaking and the inability to switch, etc ...
Myths + corporate secretiveness = Lots of unanswered questions about this oil.
--- Bror Jace
No, I'm not holding my breath.
We all know that for cold flow-ability, you need to go with a synthetic base oil ... or at least a good blend.
My guess is Castrol has come up with a synthetic blend ... but don't want to call it such because of all of the misinformation "out there" about synthetics causing leaking and the inability to switch, etc ...
Myths + corporate secretiveness = Lots of unanswered questions about this oil.
--- Bror Jace
Start Up is nothing more than a domestically blended version of Castrol GTX Magnatec, which has been produced in other parts of the world for years. It's a blend of conventional Group II/III and Group V.
Castrol Australia Magnatec Page
Maybe the thicker 10W "clings" to the metal?
So would the esters in a maintenance dose of auto-rx do the same thing in a group 3 oil (Mobil DC)
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