Ohhh Shizzz.... My turbo is F'd and guess why?!?!?!

[sweet97]

I agree with you Mack. I used to use Valvoline Synthetic but have not seen it for a while. It was a 15W-50 I do believe. I have seen their semi-syn but not the full synthetic. If you find it le me know it's still available. Thanks, Mark

 

[carbonfire]

I actually work at a parts store, and we have gotten great responce about the new 7500 Mobile Syn Blend. I actually put that stuff in my car last oil change, 10W30 and it seems to run better than before, and the lifter tick goes away faster now and stays gone for longer.... I still need new lifters but hey it seems to be working.

 

[gixrman]

According to their website the 15W50 in regular MOBIL 1 is nolonger available. That weight is only available in extended formulation. I liked the heavier weight. Mark

Why in the world would you want to use heavy ass 15W50???? WTF Thats stuffs like gear oil. Are you intentional trying loose HP and put more added stress on your motor?

 

[trebornash]

The 15w-50 Extended Performance oil from Mobil1 does not say"approved for turbo vehicles".I couldn't find the old stuff.However I did find a bottle of regular 10w-30 synthetic Mobil1 that said "approved for turbo-charged vehicles".Pretty sure this was a newer bottle so I'm guessing they did not discontinue the reg 10/30syn

 

[HighPsi92GST]

oil pressure is overrated

WTF thats a first

 

[jawsgst]

Why in the world would you want to use heavy ass 15W50???? WTF Thats stuffs like gear oil. Are you intentional trying loose HP and put more added stress on your motor?

Gear oil? What gear oil are you using, the last thing i put in my Tranny was "gear oil" like, it was Penzoil Synchromesh. I want to say it is about 70w or 80w considering the owners manual calls for such. But anyway sorry to hear about your turbo, hope it all works out for you and I personally use Valvoline 10w-30 full syn and haven't ever had any problems with it.

 

[las_vegaslazer]

Yes the old mobil 1 10w-30 and 5w-30 is still being sold. I put the new stuff in my car and then i read this post and read the back of the bottle. When it did not say ok for turbo motors i went and found some mobil 1 10w-30 and put it in. If you look at the back of all oil bottles some say ok for turbo motors and some don't.

 

[sweet97]

Why in the world would you want to use heavy ass 15W50???? WTF Thats stuffs like gear oil. Are you intentional trying loose HP and put more added stress on your motor?

15 weight oil is NOT heavy. In fact MOBIL recommends their 15 weight for high revving motors in high heat conditions. My 2l revs fairly high and certainly gets HOT! Gear oil is a 75 weight in most cases. It's the heat that destroys the oil's viscosity. Use regular, non-synthetic oil and your motor would start to lose pressure in 1000miles. Castrol GTX for high revving motors is a non-syn that is a 20W-50 weight oil. Mark

 

[sweet97]

The 15w-50 Extended Performance oil from Mobil1 does not say"approved for turbo vehicles".I couldn't find the old stuff.However I did find a bottle of regular 10w-30 synthetic Mobil1 that said "approved for turbo-charged vehicles".Pretty sure this was a newer bottle so I'm guessing they did not discontinue the reg 10/30syn

It seems that MOBIL has dropped the 15W-50 in their regular MOBIL 1 that came with a RED cap. That weight is available in the extended life. There is an 800 # that we can call for MOBIL info. I will be calling today and expressing the fear that the extended life is inferior in some way possibly/why does it not say "for turbo use"?
1-800-ASK-MOBIL. Mark

 

[trebornash]

There's one too many digits in that Mobil1 800#. The number to call is 1-800-662-4525.

 

[sweet97]

1 too many didgits, correct. I have the bottle right here. Thought I made a mistake but that's what it says. 1-800-ASK-MOBIL. maybe the website has the #. www.MOBIL1.com ??

I CALLED THE #.The last didgit is not needed it is just to make it sound nice rather than ask-mobi. The 15w-50 in the standard MOBIL 1 has indeed been dropped. Extended life has more of the "good stuff additives" in it. The guy who answered said his personal street car puts down 650HP to the wheels (no I did not ask him what it was). He sees a 9HP difference between a 15w and the lighter weight. For most of us that woud mean a 4 HP difference in HP at the expense of extra protection of the heavier oil. He did give the expected response of using the correct viscosity as called for "for your" specific vehicle. Having safe for turbo vehicles on the botle is a marketing decision. That sounds like "say whatever you think will sell the oil" to me. Nothing very technical/labratory tested in a marketing decision IMHO.
This will probably never be resolved and will be a personal decision. Ask what's the best of anything and usually there are many responses, especially in something like oil. Some love it, some hate it. Mark

 

[gixrman]

I said LIKE gear oil not gear oil, just exagerating the point that its thickass oil when cold. SWEET97 you being in NY and cold 9 mnths out of the year cold start up must be hell. If your that worried about over heating the oil than run a oil cooler. I've used 0w-30 and held the same oil pressure as 10w-30.

 

[sweet97]

Gixman we only drive 6 months due to the roads being covered with snow and/or salt and ciders. I ran straight 50weight on my first oil change last April due to uncertain oil pressure. Stock gauge had to be tested as it went low when warm idle. No trouble. The oil cooler will be done anways as all turbo cars should run one. Also my car has 109k miles and clearances are not as new. Like I said this is a personal issue and no group will agree on this. best to all,Mark

 

[Mackzero]

Well, I spoke with Precision Turbo and they are covering everything under warranty. I had an older style bearing section in the turbo, and they are upgrading it to the newer style. And it did not have the 270 deg. bearing section, it did have the 360 deg race bearing in it. I also am paying an extra $180 to have them put the 57 trim wheel in there in place of the 55 trim for a little extra top end. Not that I really need it, just like to have it. They said 20-26 psi should be perfect to run on my setup to be in the turbo's efficiency island. I was going to upgrade to the non-ballbearing GT35, but I do not want lag and it was going to be just over $500. I could sell this turbo, add the $500, and get a ballbearing GT35r for that.

I should have the turbo back in the car by the end of the weekend. I will let you all know how it runs.

 

[gixrman]

I also have 108K on a stock motor and agree with you on personel prefrence. Using that thick of an oil just make me fear oil starvation at startup. It would be like masterbating with vasoline instead of KY. Once you got it warm its ok, but the start up would be ruff.

 

[Peatry85]

Lol, thats awesome

 

[91orangeGST]

What oil do you guys suggest for highest over all oil pressure?

 

[Defiant]

15 weight oil is NOT heavy. In fact MOBIL recommends their 15 weight for high revving motors in high heat conditions. My 2l revs fairly high and certainly gets HOT! Gear oil is a 75 weight in most cases. It's the heat that destroys the oil's viscosity. Use regular, non-synthetic oil and your motor would start to lose pressure in 1000miles. Castrol GTX for high revving motors is a non-syn that is a 20W-50 weight oil. Mark

15W-50 isn't "15 weight". It's a 50- weight oil that thickens as much as a 15-weigh oil will at 0°F.

 

[sweet97]

I have always had that reversed. 15 weight oil with properties of a 50 weight. Still good. I will have to look into my error. thanks, Mark

 

[91boost]

I only use 0W-30 Amsoil in all of my turbocharged cars. Now that stuff is thin.

 

[99gst_racer]

Please correct me if I'm wrong (no flaming).....
But isn't a synthetic 20w50 actually thinner than a regular 20w50 oil??
Not nessacerily the 20w50, but just any oil in paticular. I always thought that synthetic was thinner as apposed to the same thing in a standard oil......

 

[JiveMasterT]

Please correct me if I'm wrong (no flaming).....
But isn't a synthetic 20w50 actually thinner than a regular 20w50 oil??
Not nessacerily the 20w50, but just any oil in paticular. I always thought that synthetic was thinner as apposed to the same thing in a standard oil......

i dont really think there is a difference, but someone will come prove me wrong...

 

[Defiant]

Please correct me if I'm wrong (no flaming).....
But isn't a synthetic 20w50 actually thinner than a regular 20w50 oil??
Not nessacerily the 20w50, but just any oil in paticular. I always thought that synthetic was thinner as apposed to the same thing in a standard oil......

Well, to get even further from what the topic used to be, the look of oil -how fast it pours out of the bottle- has no relation to viscosity index and performance characteristics. The API specs are all that matter, and they've been checked where it matters.

And, as always, we wind up finding out that "differences" in modern motor oils just don't matter as much as our thinking about them does.