After much thought and deliberation, I changed my oil in my 01 e55 to GC. A good choice it seems, as I am currently getting outstanding gas mileage on freeway trips (approximately 23.5). My question is this: knowing that Gc is a thick 30 weight, is it adequate to protect my engine? I am contemplating trying Redline 5w40 here in a couple days and was wondering if it is worth switching....I definately want the best oil for the car as it has 90k on the odometer and needs to be babied as much as possible.
Second question in regards to the GC/ Redline quandry... Would the engine in a 98 Toyota 4runner with 155k like the GC composition? Currently I am running Redline 5w30 and it seems to run extremely quiet. i just switched the oil over to synthetic when I purchased the car at 145k. i had a dose of Redline 5w30 in the engine for a good 10k to to facilitate the cleaning process. I assume that the oil pulled some #@$%! out of the engine in that it came out extremely dark. I hope this is a good thing. I am guessing that a 10k oil interval with GC or Redline would be ok. I am trying to marry these two engines with therir optimal oil. I encourage those with oil experience and knowledge to chime in and assist me. Thanks.
Second question in regards to the GC/ Redline quandry... Would the engine in a 98 Toyota 4runner with 155k like the GC composition? Currently I am running Redline 5w30 and it seems to run extremely quiet. i just switched the oil over to synthetic when I purchased the car at 145k. i had a dose of Redline 5w30 in the engine for a good 10k to to facilitate the cleaning process. I assume that the oil pulled some #@$%! out of the engine in that it came out extremely dark. I hope this is a good thing. I am guessing that a 10k oil interval with GC or Redline would be ok. I am trying to marry these two engines with therir optimal oil. I encourage those with oil experience and knowledge to chime in and assist me. Thanks.