car engine oil / diesel Iggy, please jump in!

[dannygraves]

ok, so I'm on the 3si board doing research on what oils everybody runs. these cars (3000gt/stealth turbo) are notorious for oil pressure issues... well, one big pump pusing oil through all those journals to 4 cams, 2 turbos 12 various oil squirters and a big oil cooler will do thet.
Anyway, everyone agrees on running a 10w40 or similar weight, but the big debate come out of tne type of oil.
a few guys are swearing by deisel 15w40 and 5w40 oils like the rotella, delo, etc. and a bunch of guys swear by the group 5 %100 ester based oils like redline and motul v300. No one has any real info to backup any of the pros or cons to either.
I ahve always run moble1, but I guess recently its become more of a group 3 oil than a group4.
anyway, what I'm getting at is what oil should I run it a twin turbo car that will see 8000rpms in 120* ambient temps and has to flow through 2 1000* turbos, but will maintain its vicosity?

[AlisoBob]

With all that plumding, I'd go 10w/30 for good pumpability.

For brand?

You only really have two brands to consider.... Mobil 1, and Amsoil.

Why, you need a synthetic...

It researching turbo oil for my duramax, I read allot about turbo engine requirements.

In these high-output powerplants, enough heat is generated to cause a lighter petroleum lubricant to evaporate and significantly increase viscosity within weeks of its introduction into the crankcase. High temperature stability, as well as oxidation-resistance, is of absolutely paramount importance when it comes to turbocharged engines. Because it must both lubricate and cool the turbo unit, the oil MUST be specifically formulated to withstand the turbo's extremely high operating
temperatures.

Oil film temperatures often exceed 450F in the turbo unit
during operation, and can surpass 650F ( ) during a short periods or full aceleration and immediately following engine shutdown...both figures far exceeding the thermal limits of petroleum oil.

Synthetics, with their capacity to maintain proper (low) viscosity and lubricity under these high heat anstress conditions, and with their natural resistance to oxidation, have risen to the fore. It is also important to note that the high-temperature-stability properties of synthetics are designed primarily into the base-stock oil itself, rather than being achieved primarily with additives.

The advantage with approach is twofold: Additives, which may account for as much as 25% of the volume of a can of premium petroleum oil, by themselves have little or no lubricating properties per se. Thus the more the additive content in an oil, the less lubrication is available to the engine; and most additives tend to volatilize (evaporate) and deteriorate with heat and age and use, so that the overall effectiveness of the lubricant itself is significantly diminished within only a few thousand miles of driving.

Diesels oils differ fom gas oils mainly in additives used to control soot, again of no use is a gas trubo oil, and these additives again replace volume that can and should be used by the lubricating and cooling " base stock" oil itself....

Run this Danny.....

http://www.mobiloil.com/USA-English/Mot ... 0W-30.aspx

Its cheap when its on sale ( $6 or less a quart at Wally World ) and you can get it anywhere.

[dannygraves]

thanks Bob, that exactly what I would have run if I didn't start reading up on everyone elses opinions

[nmdesertrider]

Mobile 1 I think switched to the reformed dino oil (cheaper) and is no longer an ester synthetic, which is a shame since they invented the stuff.
I think Amsoil is the real thing.

[iggys-amsoil]

Mobile 1 I think switched to the reformed dino oil (cheaper) and is no longer an ester synthetic, which is a shame since they invented the stuff.
I think Amsoil is the real thing.

Mobil 1 comes in three grades now. I think the Gold cap is there full synthetic / 15,000 mile change. The other two para/semi synthetic and then the dino oil.

Well Danny I thought the Stealth was Dodge product unless I got the year wrong, Hmm... ok MITSUBISHI

http://www.amsoil.com/scripts/runisa.dl ... loaf:index

Check the Amsoil product app guide above as it tells whats recommended.
If I had to guess I would say 10-30 5-30 or better yet but more spendy the 0W-30. I can tell you that, that 0W-30 gets even better when it has 10-15K on it. I've experianced that even before Amsoil wrote about.

About ten years ago the Saab 900 or was that 9000?, could only use Ams or Mob 1 10W-30 for the turbo anything else and the bearing would fry.

[teamdns]

iggy, the mitubishi 300GT VR4 and the dodge Stealth twin turbo are the same power plants and platform was just a joint venture from the 2 companies

[dannygraves]

thanks iggy!
ya, ryan is right, infact the dodge stealth was even fully manufactured in japan and the only parts that don't interchange between the 2 cars are some body panels and the head and tail lights. but if you get all the body parts from the other car (fenders, trunk lid, hood, bumpers, etc.) you can make a stealth a gt and switch
In fact I was thinking about getting the '99 gt front end and switching to get rid of the popup headlights and have the big front opening to add a FMIC.

[dannygraves]

a lot of DSMs were like that in the '80s and '90s the mitsu starion/crysler conquest were the same car, the eclipse/eagle talon/plymouth lazer, the 3/s then there are all the pickups and minivans, like the mitsu mighty max and dodge ram d50

[hoofarted]

Dont forget about Ford/Mazda - the B3000/Ranger series...

[britincali]

They are still doing it now with the trucks, the dodge dakota and mistsu thing are the same truck, also the sebring/stratus/eclipse a couple of years ago.

Most makers do it or have done it at some point

Pontiac vibe/ toyota matrix
saturns use toyota motors
the escape hybrid uses 1st gen prius tech
honda/rover/strerling
mercedes SLK and chrysler crossfire
pontiac GTO/holden

and on and on lol

[dannygraves]

of coarse, if you start looking at engines its a whole new ballgame. I think there are more toyota and mitsubishi motors in the world than anything else.
lotus uses a toyota motor and mitsubishi makes the engines far a whole pile of cars, like hyundai, kia, etc. etc.

I even heard that suzuki is now selling a rebadged w/ different bumpers, etc. nissan frontier
nobody makes their own shit anymore