Perhaps the high ester content of the Castrol dislodged something. I would change the filter and/or oil (again with Castrol) to be sure before condemning it.
Startup noise with GC
- Thread starter Bobert
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Nothing wrong with the oil. Filter not working, oil to thick for engine, oil passages clogged...etc
I just switched to GC in my Passat(1.8T) and do not notice anything different. Everything sounds fine on startup. The previous oil was Lubro-Moly 5W-40 and I'm still using the Mann 719/30 oil filters. I can't comment on gas mileage, but I don't suspect there will be any difference.
I solved the cold start problem with German Castrol by adding 7 ounces of Valvoline Synpower Oil Treatment. The noise is completely gone now. At first I added a 1/4 quart of Mobil 1 15w-50 and it quieted the cold starts by about 75%, but after adding the Synpower Oil Treatment, cold starts are silky smooth. The car sat around for 4 days straight before starting it today, and the motor starts really quiet now. I have a feeling the copious amounts of moly and boron in the Synpower additive did the trick. The Mobil 1 15w-50 was just along for the ride at this point.
I'm happy that the Synpower additive that worked, because I was about to dump $30 worth of GC. I'll most likely move on to Mobil 1 0w-40 or possibly Synergyn 5w30 on the next oil change. The current brew of GC will stay in for 7500 miles and will see how it does.
I'm happy that the Synpower additive that worked, because I was about to dump $30 worth of GC. I'll most likely move on to Mobil 1 0w-40 or possibly Synergyn 5w30 on the next oil change. The current brew of GC will stay in for 7500 miles and will see how it does.
I see your in NC,I'm in MD so our climate conditions aren't all so different.
Like I posted earlier I put Mobil 1 5W30 in my 00 GTI VR6 with no problems at all.My first engine start after I changed the oil(when the filter was pretty dry)resulted in absolutely no start up noise what so ever
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This morning I started it at 36.0F with no noises at all,just a smooth quick start
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Maybe that GC is too thick at temperatures above freezing
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Like I posted earlier I put Mobil 1 5W30 in my 00 GTI VR6 with no problems at all.My first engine start after I changed the oil(when the filter was pretty dry)resulted in absolutely no start up noise what so ever
This morning I started it at 36.0F with no noises at all,just a smooth quick start
Maybe that GC is too thick at temperatures above freezing
A little more food for thought: in my last car, a V-6 Camry, I got louder, rougher starts for about the first ~1000 miles or so on GC. Then it smoothed out very nicely. Why I have no idea.
Yesterday, I put GC into my new car, an Infiniti G35. Cold start this morning was purrrrr-fect -- no hint of start-up roughness at all. I'd heard that the VQ series V-6s like GC, and all of 24 hours into its first fill, it seems really good. UOA in a month or so.
Yesterday, I put GC into my new car, an Infiniti G35. Cold start this morning was purrrrr-fect -- no hint of start-up roughness at all. I'd heard that the VQ series V-6s like GC, and all of 24 hours into its first fill, it seems really good. UOA in a month or so.
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