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Old 01-06-2013, 11:42 AM   #61
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Mobile 1 synthetic 5w-30 at 5-8k miles pending on OLM.

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Old 01-06-2013, 10:31 PM   #62
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Am I the only one that feels running a full synthetic(amsoil signiture series and amsoil filter rated at 25k miles) is good for about 12-15k miles if you drive mainly highway?

I average 1500kms a week, most of which is highway, so I put on 15k miles in 4 months. Most recently, I change my oil every 12-15k miles. Even after that mileage, it hasn't dropped even a bit, and oil still looks like new.

Any thoughts?

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Old 01-07-2013, 08:28 AM   #63
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Running Amsoil 5w-30 Signature Series and Wix filters on the G8. Just received back my oil analysis results from Blackstone Labs. This sample had 10,000 miles on it and they said it could go 12,000 miles between changes easily. Next sample will be taken at 12,000 and we will see how the results are then.
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Old 01-07-2013, 08:37 PM   #64
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I've been using Mobile 1 synthetic 5w-30 and change it when my OLM reads 35%
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Old 01-07-2013, 09:17 PM   #65
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My G8 GT is my company car... they allow us to choice our own sedan. Pretty cool hey? I purchased the car December 2011 and have had the car for just over a year and already have 85,000 miles on the car. That is the sad part! So I tend to over analyze everything and started with my oil changes. I have a great deal of faith in the OLM system and here are my findings-

Tried and tracked the 1st dealership conventional 5W-30 change and it was good to 9k with a loss of 1 quart for the duration at 5%.

Went to Castrol Edge on the next change and the car went to 11.5k at 5%.

Spoke with a Mobile 1 Engineer (by chance at a business consultation) and they explained the new molecular discovery on their Mobile 1 Extended Performance oil and encouraged me to try. Apparently they just changed the process mid last year. So on the last two changes, tracked the car to 15k as the product prescribed and still had 11% showing on the OLM.

So my permanent choice from now on will be Mobile 1 Extended Performance 5W30 with their Mobile 1 filter.

Hope that helps.
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Old 01-07-2013, 09:48 PM   #66
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castrol 0w 30.
6-8k i change my oil twice a year.
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Old 01-07-2013, 10:04 PM   #67
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Amsoil 5W30.

Mobil 1 5W30 otherwise.
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Old 01-08-2013, 05:54 PM   #68
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Quote:
Originally Posted by hayabusa160 View Post
castrol 0w 30.
6-8k i change my oil twice a year.

just sent my 10k sample of GC off to Blackstone labs, we will see how it holds up!
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Old 01-08-2013, 07:28 PM   #69
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Anybody have a link for an amsoil 25k mile filter or any amsoil filter for our car? On their website when I look under g8 they have one WIX filter (which I may get because it is cheap and I know that WIX has good stuff too) and one Amsoil filter but it is obviously the wrong one.
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Old 01-08-2013, 07:35 PM   #70
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Quote:
Originally Posted by Zdaddy View Post
Apparently they just changed the process mid last year. So on the last two changes, tracked the car to 15k as the product prescribed and still had 11% showing on the OLM.

So my permanent choice from now on will be Mobile 1 Extended Performance 5W30 with their Mobile 1 filter.

Hope that helps.
The OLM does not know what oil you are running and receive no feedback whatever from the oil itself when it comes to calculating remaining oil life. In other words switching to M1 extended had nothing to do with 11% remaining on the monitor at 15K.

The OLM has a complex calculation which takes RPM, oil temp, pressure and many other parameters when it comes to calculating remaining oil life.
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Old 01-09-2013, 10:19 AM   #71
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Quote:
Originally Posted by Zdaddy View Post
My G8 GT is my company car... they allow us to choice our own sedan. Pretty cool hey? I purchased the car December 2011 and have had the car for just over a year and already have 85,000 miles on the car. That is the sad part! So I tend to over analyze everything and started with my oil changes. I have a great deal of faith in the OLM system and here are my findings-

Tried and tracked the 1st dealership conventional 5W-30 change and it was good to 9k with a loss of 1 quart for the duration at 5%.

Went to Castrol Edge on the next change and the car went to 11.5k at 5%.

Spoke with a Mobile 1 Engineer (by chance at a business consultation) and they explained the new molecular discovery on their Mobile 1 Extended Performance oil and encouraged me to try. Apparently they just changed the process mid last year. So on the last two changes, tracked the car to 15k as the product prescribed and still had 11% showing on the OLM.

So my permanent choice from now on will be Mobile 1 Extended Performance 5W30 with their Mobile 1 filter.

Hope that helps.
Quote:
Originally Posted by Dictatorsaurus View Post
The OLM does not know what oil you are running and receive no feedback whatever from the oil itself when it comes to calculating remaining oil life. In other words switching to M1 extended had nothing to do with 11% remaining on the monitor at 15K.

The OLM has a complex calculation which takes RPM, oil temp, pressure and many other parameters when it comes to calculating remaining oil life.
I was under the understanding it used several ECU parameters and the presence of several chemicals that present themselves as the oil deteriorates.
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Old 01-09-2013, 10:45 AM   #72
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Quote:
Originally Posted by EMS Guy View Post
I was under the understanding it used several ECU parameters and the presence of several chemicals that present themselves as the oil deteriorates.
It has no clue what oil you have in there or any way of analyzing it. You could run olive oil in there and it would have no clue
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Old 01-09-2013, 11:00 AM   #73
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Quote:
Originally Posted by Dictatorsaurus View Post
It has no clue what oil you have in there or any way of analyzing it. You could run olive oil in there and it would have no clue
Reference:
http://www.camaro5.com/forums/showthread.php?t=145143
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Old 01-09-2013, 04:17 PM   #74
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I thought we did this once already, but here goes again. I only use Mobile 1 in all of my vehicles. Either a Fram or AC Delco filter, and change at ~10K miles. The OLM usually says that I still have 20%+ still left on the oil.
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Old 01-11-2013, 10:55 PM   #75
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Mobile 1 synthetic 5w-30 at 5-8k miles - aprroximately when OLM is at 50%. I will be changing to Penzoil Ulta 5w30 as it seems to clean the engine slightly better than the Mobile 1. Not sure about the Mobil 1 extended performance as it is fairly new. The OLM is a nice tool but does not take into account the type of oil & filter being used, only engine performance & temperature. Personally, I would not let the OLM get to under 25% or go beyond 1 year between oil changes no matter what kind of oil & filter being used.


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Old 01-11-2013, 11:42 PM   #76
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OK I read the referenced bobistheoilguy post and it doesn't say the OLM has a sensor for ZDP levels, only that the algorithm is based on ZDP depletion measured during numerous tests.

I assume the ZDP measurement was done via oil analysis of samples. Nowhere is it stated that there is any sensor for any chemicals in the OLM system.
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Old 01-12-2013, 12:10 AM   #77
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You got it...The algorithm is based on averages of the ZDDP levels in multitudes of different oils & viscosities tested. Like I said...a good tool, but, I wouldn't bet my engine on it. When they invent a sensor that can actually detect the Zinc & Phosphorus levels among other measurements such as the molecular cohesion percentage for the dirt & soot particles in the oil, than I will be really impressed and...more trustworthy.
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Old 01-15-2013, 11:49 AM   #78
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Quote:
Originally Posted by djerickd View Post
just sent my 10k sample of GC off to Blackstone labs, we will see how it holds up!
Keep us posted!

Quote:
Originally Posted by LINightflyer View Post
You got it...The algorithm is based on averages of the ZDDP levels in multitudes of different oils & viscosities tested. Like I said...a good tool, but, I wouldn't bet my engine on it. When they invent a sensor that can actually detect the Zinc & Phosphorus levels among other measurements such as the molecular cohesion percentage for the dirt & soot particles in the oil, than I will be really impressed and...more trustworthy.
hmmmm. Another puzzle piece.
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Old 01-15-2013, 02:44 PM   #79
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Just ordered my WIX filter. Gonna be doing Mobil 1 Extended Performance. Let's see what happens.
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Old 01-15-2013, 02:50 PM   #80
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I use Mobil 1 5w30 full synthetic "high mileage" - I change it every 7,500 miles or so, usually has 40-50% on the OLM. I could go longer but I never have, earlier on I changed it religiously @ 5,000 miles.

Could I go longer? Sure. But I for one am convinced a more rigorous oil change interval is essential to avoiding any of the "lifter failures" people are experiencing w/ these cars. Thin old oil could be the culprit.

You can agree or disagree, but I'm the one w/ 102,000 miles on the car and not one tick of a problem
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