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SkinnedKnuckles
Jedi Trainee
Offline
First off - both oils are very good imo. I only present this as an observation.
I've used Redline 15w-50 for 5 or 6 years. I change oil at about 10k mile intervals. When it came time for the latest change I kinda choked at the ~$11/qt figure (+ shipping) - with a few extra qts it was going to be well over $100. Someone brought up the Brad Penn oil - about half the cost of Redline, plus extra zddp. So that's what I went for.
The observation is that the synthetic Redline has a much flatter viscosity curve with temperature - exactly what they claim. Cold start-up pressures were about 75 psi, warm pressure at 2000 to 2500 rpm was roughly 60 psi, and idle was in the 30-40 range.
Brad Penn starts out really thick - over 75 psi, and could easily hit 100 psi if you give rev's too early. When it's warm it settles out at 50 psi in the 2000-2500 range, and gives and idle pressure of 20 psi, I'd say.
I'm not suggesting any problem at all. Just thought it was interesting how different oil types behave and decided to pass it on.
I've used Redline 15w-50 for 5 or 6 years. I change oil at about 10k mile intervals. When it came time for the latest change I kinda choked at the ~$11/qt figure (+ shipping) - with a few extra qts it was going to be well over $100. Someone brought up the Brad Penn oil - about half the cost of Redline, plus extra zddp. So that's what I went for.
The observation is that the synthetic Redline has a much flatter viscosity curve with temperature - exactly what they claim. Cold start-up pressures were about 75 psi, warm pressure at 2000 to 2500 rpm was roughly 60 psi, and idle was in the 30-40 range.
Brad Penn starts out really thick - over 75 psi, and could easily hit 100 psi if you give rev's too early. When it's warm it settles out at 50 psi in the 2000-2500 range, and gives and idle pressure of 20 psi, I'd say.
I'm not suggesting any problem at all. Just thought it was interesting how different oil types behave and decided to pass it on.
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