Quote:
Originally Posted by bigsnake
Matt, why STP red instead of blue? It's my understanding that the red is for 4 cylinder application.
|
Red has twice the key ingredients as Blue. I don't know why they market one or the other. I assume, from reading their web-site tha they are marketing based on the premise that today's 4-cylinder engines are working harder than today's V-8's. This may be true when comparing a Mitsubishi Eclipse to a Buick LaSalle. If you focus on performance level per cylinder, I'd look to the Red.
NOTE: The STP website points out that STP Red (and Blue) will increas your oil viscosity. This is not something I desire. Therefore, I'd recommend some of the other oils I chose rather than a simple additive.
Finally - I want to reiterate that I'm not part of the whole "Brand X" is the only way to go crowd. If Royal Purple or Redline or Amsoil is your thing - great. I stuck with the same brand - even though I changed oils. Hopefully that helps me be a little more scientific, a little less biased, and a little more creditable as a source.
I hope I have been helpful.