I'm getting ready to flush the brake system on my 2001 Silverado. I just got a set of Speed Bleeders, but have not been able to decide on a fluid.
I have searched the posts on this forum, and there seems to be some disagreement about using DOT 4 in a system that calls for DOT 3--some say 4 could absorb more water or harm components, and others say they are completely compatible. The filler cap and manual both specify DOT 3--"Delco Supreme 11" or equivalent.
So, can anybody clarify the 3 vs 4 issue for this vehicle? I can get Castrol LMA 3/4, which gets good reviews here. Next to it at Pep Boys is Gunk Premium DOT 3, which claims a 450* dry boiling point, but does not mention a wet point higher than DOT 3 specs. How does the Delco fluid compare to those and other fluids? I've never seen the Delco specs.
Thanks for any comments.
I have searched the posts on this forum, and there seems to be some disagreement about using DOT 4 in a system that calls for DOT 3--some say 4 could absorb more water or harm components, and others say they are completely compatible. The filler cap and manual both specify DOT 3--"Delco Supreme 11" or equivalent.
So, can anybody clarify the 3 vs 4 issue for this vehicle? I can get Castrol LMA 3/4, which gets good reviews here. Next to it at Pep Boys is Gunk Premium DOT 3, which claims a 450* dry boiling point, but does not mention a wet point higher than DOT 3 specs. How does the Delco fluid compare to those and other fluids? I've never seen the Delco specs.
Thanks for any comments.