No doubts that a purist who makes a flush before flushing will have it clean with any oil.quote:
Originally posted by Patman:
You guys are welcome to fly up here and tear down my motor and have a look at it's "guts" if you really want to see how it's doing!![]()
Your 3k change seems quite reasonable under the circumstances. I'm on my first run of GC right now, and I remain a bit puzzled by the stuff, although not as concerned as I was at first. I still seem to have some higher RPM harshness/raspiness that was not present with the prior fill of Amsoil ASL 5w-30. It does seem to be diminishing with time. I now have about 750 miles on the oil.quote:
Originally posted by Patman:
I've been running GC longer than just about anyone on here and I've seen no issues yet. You guys are welcome to fly up here and tear down my motor and have a look at it's "guts" if you really want to see how it's doing!![]()
By the way, I'm going to post another UOA from my Firebird tonight (running GC of course)
This UOA only will have 3k on it though. I decided to change it early due to my problems starting my car a few weeks back, and the possibility that a lot of fuel got into the oil. Plus I know it spent a lot of time idling at the dealership when they changed the coil and coil wire. I also wanted to change it so I could have a steady run of this oil from May until September, so there would be no sub 50F starts on it. And last but not least, I made 8 dyno runs on Saturday too, and discovered an air leak, so now that this problem is solved, my wear numbers should come down even lower! We were forced to run the car on the dyno without an air filter for a few runs too, so I'm sure more dirt got sucked in then too. So even though 3k sounds like a short interval, based on all of the above reasons, I'm sure even the most die hard "3k hater" would agree with me that the oil needed changing. The UOA will be interesting!
I started out the day at 254rwhp, mine is a stock LT1, with automatic trans and with just a catback as the only modification. That first dyno run was with a 14:1 a/f ratio. Then with some tweaking we got it to 265rwhp, but more importantly we flattened the torque curve a lot and picked up 30 foot pounds in the midrange. The final a/f ratio was 12.5:1. We ran out of time but I'm going to go back once I get new plugs and we'll squeeze another 5rwhp out of it and hopefully a bit more torque down low too. The engine feels considerably stronger now, it races to the redline much quicker and really snaps you back in the seat on the shifts. Easily a 2-3 tenths improvement in the quarter.quote:
Originally posted by novadude:
What kind of dyno numbers did you see?
A single event doesn't make a trend. Considering the portion of the synthetic oil market held by M1, if there were widespread sludging issues with it I think we'd all know about it.quote:
Originally posted by Audi Junkie:
Here we go again.![]()
What makes you so sure Mobil 1 is so great at "cleaning"? There is at least one current post reporting how Mobil 1 left lots of sludge behind that was flushed into the filter by a HDEO. I am on my 3rd change of GC, 6 months per change. Don't feel like pulling my v/c to see how it looks, but from under the filler cap, it is clean.
So, if I ask Castrol why they dropped 0w-30 they will say "because of those Austrailian posters"?quote:
removed at least one 0W-30 formulation from the market because of these issues and that was mentioned by the Australian posters
If the guy used M1 the whole life of the car and had sludge, that tells me something.quote:
A single event doesn't make a trend
That tells me that there might be something wrong with the engine, not the oil.quote:
Originally posted by Audi Junkie:
If the guy used M1 the whole life of the car and had sludge, that tells me something.
Again, this engine doesn't make a trend no matter if it was the only oil ever used. I don't think anyone has said that M1 or anything else will always, without fail, everytime keep an engine sludge free. The point is, M1 has a proven track record of doing an adequate job in this area most of the time.quote:
Originally posted by Audi Junkie:
So, if I ask Castrol why they dropped 0w-30 they will say "because of those Austrailian posters"?quote:
removed at least one 0W-30 formulation from the market because of these issues and that was mentioned by the Australian posters
I don't imagine 0w-30 being too popular there anyway, replaced by 0w-40 perhaps.
Maybe it is a legit question if there was not a comparison to M1.
If the guy used M1 the whole life of the car and had sludge, that tells me something.quote:
A single event doesn't make a trend
Yes. As I recall, some of the early 80's Klotz MC oils had corrosion problems because of this very thing...quote:
Originally posted by Motorbike:
Interesting , imagine esters along with moisture and how well they may or may not play together![]()
Well now, that comment is guaranteed to calm the Castrol critics right down. . .quote:
Originally posted by Audi Junkie:
jsharp, you are right. Maybe the original post itself was contraversial. I am brand-blind, but the only Mobil I am using is M1 SUV. I am objective, and not totally attached to one brand. That is what makes me not want to hear the anti-Castrol retoric, it's not really very intelligent. I doubt that Audi, one of the finest mass-producton cars, would pick a bad oil for their original fill. Anyone in the US can justify GC as a top otc oil, best of all, it is imported. I would not be surprised to see Motul and Audi together in the future. More on that later.