Originally Posted By: Corvette Owner
Castrol has sent what I feel are mixed signals about this oil. First off, they have Castrol Edge Syntex and Titanium. Why have two?
I have used the old Edge twice in my Corvette with outstanding results, but what with the confusion (of two oils) and lack of 5 quart jugs (in my area), I am reluctantly switching to Pennzoil Ultra (I refuse to spend over $8 a quart for 7 quarts of oil).
You got a good deal though.
Castrol has two synthetic offerings much for the same reasons Pennzoil has Platinum & Ultra and Mobil has Mobil 1 & Mobil 1 EP - more products on the shelf, larger product line to fill in niche and I guess synthetic oil has been around long enough, just being a syn does not mean it is their top oil anymore...syn now falls into the good, better, best within a companies line up .