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Originally Posted by clayfoushee
I've been using Shell Rotella 15w-40 as well, but I am told the formula changed recently, and it now has a significantly lower zinc content. So, I'm searching for the best solution now.
Although I know synthetics are far superior for sheer strength, I have concerns about the slippery stuff in a 5-year old FE. It does tend to find ways to leak better too. |
Blame for leaks belongs first to poor workmanship and poor seals/gaskets. I've got over 17,000 miles on a Hi-Po 289 engine using Mobil 1 15W-50 with zero leaks.
Z. Ray