racer88

Huh? Patman where did you think we were talking blends? As much as I know synpower<--is fully synthetic

This was the difference I noticed switching from MOBIL1 10W30 TO Valvoline Synpower fully synthetic

Just posting results on the major difference I noticed especially after track runs and some dyno runs!! I used no oil even hammering this car to WOT and shifts alot....over 3k <img src="images/icons/grin.gif" border="0">


Claire <img src="images/icons/smile.gif" border="0">

[ November 17, 2001: Message edited by: racer88 ]</p>

Check6

Claire I think he was referring to Ragtop 99's post about buying the blended variety.

[ November 17, 2001: Message edited by: Check6 ]</p>

Patman

Exactly, Ragtop asked about the blends so that's what I was referring to. I realize that Synpower is a full synthetic. FWIW, Castrol Syntec, even though it's marketed as a fully synthetic, is actually not, it's a highly refined dino oil. It's an even bigger scam than the blends actually.

SuperCamaroSS

I agree it has to be a ring issue. I have been using mobil 1 synthetic oil since I frist got my car and it hardly ever consumes oil. I drive my car on the street and I do like to play with it a lot on the street. is there any proof that mobil 1 was changing their formula?

racer88

[quote]Originally posted by 99 Black Bird T/A:
<strong>


The problem isn't Mobile 1, the problem is a ring issue.</strong><hr></blockquote>

Okay then explain oil consumption w/ Mobil 1 (barely driven hard) and no consumption (driven hard) this last time. Like I said before, this car has been on the track weeks apart, dyno'd and no oil has been used <img src="images/icons/grin.gif" border="0">

Patman, I understand now who you meant.


FWIW, if you are happy with what you use great. I was just giving info on what I've noticed this last oil interval.

Also, the consumption of some may be rings...that is a qt used every 400-600 miles according to GM. If alot of WOT runs take place or shifts in M6's over 3k, the oil is getting sucked up under the intake.

So loss due to rings might be some cars but using a qt between 3K miles is not that big a deal.
Pull an intake an look underneath....yup, soaked with oil <img src="images/icons/smile.gif" border="0">

99 Black Bird T/A

iTrader: (4)

As to Mobile 1 being the problem, I do use the thin 5w-30 in my 228,000 mile RS Camaro, it's an old 305 TBI 3rd Gen, you know the ones that tend to guzzle oil due to "cheap factory" valve guides that leak. GM had a problem way back them with cars and oil consumtion and various oils got the blame when it really was a GM problem. This beater Camaro should guzzle the thin Mobile 1 but only uses a qt ever 2000 to 2500 miles or so because the rear main seal leaks. Which is way less Mobile 1 than a lot of new and almost new LS1 use. Our other 3 cars all use Mobile 1 5w-30 and none of them have a consuption issue.

My point is if there really was a problem with Mobile 1 then all the other cars out there using it would have problems with it.

Actually, in GMHTP they mention oil consumption being bad when the engine isn't under load espically at higher rpm. A friend of mine that used to work for MTI but now works for a Nascar engine builder, mentioned from what's he's see/knows he belives it's a ring problem on the LS1. Seems like to me since GM has a re-ring kit out and an a TBS, that would tend to point the finger away from Mobile 1.

I'd press GM hard to a re-ring if oil consumption is really a problem, because it probably won't get better with time...

I think one should use the oil they like best for their car. Of course if someone wants to use a different oil that's fine too.

Cool28

iTrader: (2)

I use good ole 20W50 in the summer and 10W30 in the winter <img src="images/icons/grin.gif" border="0"> . That would be mobil 1

99 Black Bird T/A

iTrader: (4)

[quote]Originally posted by ARTY99z:
<strong>MOBIL 1 S*CKS, Had the same results as you guys.</strong><hr></blockquote>


The problem isn't Mobile 1, the problem is a ring issue.

Patman

I was wondering if someone with the new GMHTP could scan in that article on synthetics and send it to me? I can't seem to find that magazine up here anymore, I think they stopped importing it to Canada. <img src="images/icons/frown.gif" border="0">

motorman

if you are still under GM warranty the oil you use better meet the GM specs or they will void your warranty. my C-2500 with more than 90,000 mobil 1 miles uses no oil between 4000 changes. the main reason GM puts mobil 1 in the C-5s is they can do away with the oil cooler to save weight. mobil 1 will take much higher temp than dino oil before it breaks down.

ls1fun

Some of our LS1 engines do not respond well to Mobil 1 Xw30 synthetic oil. Other members have noticed this. It probably has to do with certain engine/manufacturing variances. I am not dissing mobil 1 oil. But one thing that may help is trying a good brand alternative like non-synthetic penzoil(what the dealer uses)10w30 and a delco or mobil oil filter. Then monitor your oil consumption. You may find it helps a lot. You can try all the other routes mentioned here. But this is easy/cheap to try and may help your particular engine. It may very well reduce your oil consumption to a much more liveable 1 quart in 2000 miles or even better.
It's what i run and i use less than a quart in 2000 miles with many wide open throttle runs and higher rpm activity.
If this helps then try another synthetic like penzoil or royal purple, etc... 10w30 oil. I am sure there are other good oil filters but i recommend Mobil or delco oil filters as they are easily available and work well for everyone for our LS1 engines.

I don't really care why anymore. Just that it appears to be true for many LS1 owners.

I am glad people are trying different oils to see if it helps them as it really is easy and cheap to try. And also that many of them have gotten positive results. <img src="images/icons/grin.gif" border="0">

If it was just a ring problem then why does changing oil brands help? Probabaly some other design/variance/tolerance issues also.

For those that are having good luck with mobil 1 in their LS1's, great! For those that don't , see the above! Don't be so stuck on thinking one oil is 'magical' over another. Heck a recent article about a chevy truck stated that it went over a million miles on the same engine. Used Penzoil dino oil and changed it every 3,000 miles like clockwork. So good results can also be acheived using non-synthetic oil changed every 2-3k miles.

99 Black Bird T/A

iTrader: (4)

ls1fun makes a good point.

With a M6 car would downshifting every gear, tend to aggravate the issue? Reason I ask, GMHTP mentions higher RPM under low load, wouldn't that be like downshifting?

ls1fun

Yes it would be. You are better off beating on the brakes (except where downshifting is appropriate such as to retain control at times). They seem to like it better than babying them anyway. You hardly ever hear autocrossers talking a lot about warped rotors even though even some of them do also.

Best bet: Just have the dealer change it with dino oil every 2-3k miles, check oil level often, and have fun doing whatever you want to with your car. Just my humble opinion! <img src="images/icons/wink.gif" border="0">

Benjamin Russick

iTrader: (1)

Used Mobil 1 from day one. Drive hard and spray. No oil consumption yet. I'd like to find something a little cheaper though...

ls1fun

[quote]Originally posted by Benjamin Russick:
<strong>Used Mobil 1 from day one. Drive hard and spray. No oil consumption yet. I'd like to find something a little cheaper though...</strong><hr></blockquote>

Now why can't they all be like that is what i want to know! It seems to vary wildly! <img src="images/icons/shocked.gif" border="0">

StreetStalkerZ

iTrader: (1)

After going through about 7 1/2 to 8 qts. per oil change i switched to Valvoline syntech and drop the oil consumption to around 7 qts. and sometime a tad more if i go to the track alot. Now i have switched to Royal Purple and with almost a 1000 miles and 10 WOT runs at the track i have 0 oil consumption.

Benjamin Russick

iTrader: (1)

Yah! I've got 10,500 ugly miles (The car only goes out to race, I drive my Riv normally) without any oil issues. I agree that it is GM ring tolerance variance.

CMNTMXR57

I use Mobil 1 in mine and mine is a heads and cam car. Not a drop has fallen on my garage floor and none has been burned.

I dunno where all this doom and gloom is coming from in regards to it.

And to be honest, I'm not a big synthetics person. I like plain jane conventional Valvoline.

Matt98SS

well i made the switch on Sunday. I drive an honest 1000 miles (sometimes a bit more) a WEEK, so yes I change it every 3 weeks.

I drive on the highway with my 3 speed auto at 3500-4000 RPMs for extended periods of time not just a few mins....So I will report back my takes/opinions in approx 3 weeks from now

Former Mobil 1 15w50
current Valvoline Synpower 10w30 (all I could find besides economy car 5w30)

I beat on this car and its driven everyday so I am probably above and beyond your typical user but I may be one of the extreme ones. 1000 miles a week high RPMs, traffic galore (chicago), you name it, it sees it.

Matt

racer88

Matt I am going to the track tomorrow agian....same oil in it....I will let you know after tomorrow night...I am not at 200 miles to go til I need to change it. So far, so good. Let me/us know how it goes for you.

<img src="images/icons/smile.gif" border="0"> This will track night #4 since it was changed to this. I probably will only see maybe 3 passes if I am lucky. Gonna be a busy night and I know we have atleast 12 cars from the club going.

[ November 20, 2001: Message edited by: racer88 ]</p>