Full Synthetic Oil Recommendations - 3000gt VR4

Pennzoil motor oil
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Stock92

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Apr 21, 2012
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CA
Hi guys,

I'm trying to decide on a fully synthetic oil for a 1992 3000gt VR4 with 84k miles. I live in Northern Cali where the temps will hit 100+ this summer and use the car mainly for daily driving ( not more than 10-15 mile trips) while occasionally stomping on it for one reason or another. I will likely use 5k mile ocis. I've been doing my research on the internet and have narrowed it down to three oils: Redline 10w40, Amsoil AMO, or Royal Purple HPS 10w40. I've seen multiple posts saying how great redline is, but also warning of high wear in the first couple oci's. Without the latter, I would be sold on Redline. I also like the amsoil, but it has close to zero moly, which I think would help my engine. The HPS is probably good, but I dont want something that does not hold up to the heat my engine produces. If anyone would like to give me some good advice on which of these oils may best suit my needs I would appreciate hearing it. Thanks!
 
IIRC that mobil had a high shear rate which is something I am trying to avoid. The 6g72tt is known for tearing up oils, so Im looking for something that can handle the increased stress. I also have no need for a 0w oil as it wont get below 50 here.
 
Originally Posted By: Stock92
IIRC that mobil had a high shear rate which is something I am trying to avoid. The 6g72tt is known for tearing up oils, so Im looking for something that can handle the increased stress. I also have no need for a 0w oil as it wont get below 50 here.


In some applications, it does shear during the first part of the OCI, and then will eventually thicken back up to a 40 (other applications it does not shear at all). However, neither of this characteristics have appeared to have a negative effect on the actual performance of the product.

I use this oil exclusively in my M5.

The oil has a relatively high VI, meaning that it will be thinner at ALL start-up temperatures, which is a good thing. You don't need it to be 40-below to benefit from increased lubricant flow and the oil being closer to its operating viscosity at start-up.
 
I`ve had 2 3000GT n/a`s. Don`t use anything too thin in those engines. If you want to run a synth,give Mobil 1 10W40HM a try.
 
Originally Posted By: OVERK1LL
Originally Posted By: Stock92
IIRC that mobil had a high shear rate which is something I am trying to avoid. The 6g72tt is known for tearing up oils, so Im looking for something that can handle the increased stress. I also have no need for a 0w oil as it wont get below 50 here.


In some applications, it does shear during the first part of the OCI, and then will eventually thicken back up to a 40 (other applications it does not shear at all). However, neither of this characteristics have appeared to have a negative effect on the actual performance of the product.

I use this oil exclusively in my M5.

The oil has a relatively high VI, meaning that it will be thinner at ALL start-up temperatures, which is a good thing. You don't need it to be 40-below to benefit from increased lubricant flow and the oil being closer to its operating viscosity at start-up.


+1
01.gif
People have a misunderstanding on the whole 0w thing. You don't have to be in freezing weather to benefit from it. Additionally the whole "shearing" issue with Mobil 1 0w40 is just blown out of proportion. Some folks read into stuff WAY too much. The fact is, Mobil 1 0w40 is used in more High performance cars than ANY OTHER OIL that I can think of. Most of which ARE cars that are known to shear oils. Like Porche Turbos, VW Turbos, Volvo Turbos, Nissan GTR Turbos, I mean, this oil is factory fill in cars that puts oil to the test. You think your Mits is going to shear oil more than the Twin Turbo GTR??? The 0w40 is also recommended for use in the Mits Lancer Evo X as well. So in my book that makes it a VERY good choice. Also the availability of Mobil 1 0w40 makes it easily found without worry of shipping costs or whatever like some other oils out there. I personally feel the Mobil 1 0w40 is one of the best, most versatile oils you can buy "over the counter" regardless of price.

Jeff
 
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Originally Posted By: Jeffs2006EvoIX
Originally Posted By: OVERK1LL
Originally Posted By: Stock92
IIRC that mobil had a high shear rate which is something I am trying to avoid. The 6g72tt is known for tearing up oils, so Im looking for something that can handle the increased stress. I also have no need for a 0w oil as it wont get below 50 here.


In some applications, it does shear during the first part of the OCI, and then will eventually thicken back up to a 40 (other applications it does not shear at all). However, neither of this characteristics have appeared to have a negative effect on the actual performance of the product.

I use this oil exclusively in my M5.

The oil has a relatively high VI, meaning that it will be thinner at ALL start-up temperatures, which is a good thing. You don't need it to be 40-below to benefit from increased lubricant flow and the oil being closer to its operating viscosity at start-up.


+1
01.gif
People have a misunderstanding on the whole 0w thing. You don't have to be in freezing weather to benefit from it. Additionally the whole "shearing" issue with Mobil 1 0w40 is just blown out of proportion. Some folks read into stuff WAY too much. The fact is, Mobil 1 0w40 is used in more High performance cars than ANY OTHER OIL that I can think of. Most of which ARE cars that are known to shear oils. Like Porche Turbos, VW Turbos, Volvo Turbos, Nissan GTR Turbos, I mean, this oil is factory fill in cars that puts oil to the test. You think your Mits is going to shear oil more than the Twin Turbo GTR??? The 0w40 is also recommended for use in the Mits Lancer Evo X as well. So in my book that makes it a VERY good choice. Also the availability of Mobil 1 0w40 makes it easily found without worry of shipping costs or whatever like some other oils out there. I personally feel the Mobil 1 0w40 is one of the best, most versatile oils you can buy "over the counter" regardless of price.

Jeff


I'm running 0w40 in my Evo X. No problems and 369awhp with bolt ons and a simple tune. I should probably drive it more often though...

OTOH, my 6g72 N/A Galant burns through the factory spec'd 5w30 oil like crazy. Thicker oil in the 6g72 helps a lot.
 
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Hi,
Stock92 - These are wonderful engines with a great history. I've covered around 300kkms in vehicles with this engine from Pajero 4WDs in the outback to many high speed kms in temps around 45C for hours on end

They are very tolerant on viscosities from SAE40 to SAE60 - I've used them all

No need for a boutique lubricant - others have made wise suggestions already
 
Thanks for all of the replies. This forum really is great and I appreciate the time you all take to help. As far as the Mobil 1 0w40, it sounds like a great oil, and all of the cars you have mentioned were designed and recommended by the factory to use that oil. Unfortunately, my car was not designed for that and I trust the engineers who made the recommendations. It was 10w30, or 20w40 for hot climates. I understand they didn't have stable 0w40 weights twenty years ago, but I believe the car was designed to run and run hard within the given specs. I'm weary of putting too thin of an oil in my car as a few posters here who are familiar with the engine have already touched on. If Mobil makes a good 10w40 I would consider that as I have ran mobil 1 for a long time in another car, but was looking to make a step up being that the price is maybe $10 more per oil change for one of the boutique oils. If I can protect my baby better for $10 every few months, that's a well spent $10. If anyone can touch on if the boutiques are or aren't better not making a consideration on price, or if they firmly believe in another product such as Mobil 1, that would be great! Thanks
 
Originally Posted By: Stock92
Thanks for all of the replies. This forum really is great and I appreciate the time you all take to help. As far as the Mobil 1 0w40, it sounds like a great oil, and all of the cars you have mentioned were designed and recommended by the factory to use that oil. Unfortunately, my car was not designed for that and I trust the engineers who made the recommendations. It was 10w30, or 20w40 for hot climates. I understand they didn't have stable 0w40 weights twenty years ago, but I believe the car was designed to run and run hard within the given specs. I'm weary of putting too thin of an oil in my car as a few posters here who are familiar with the engine have already touched on. If Mobil makes a good 10w40 I would consider that as I have ran mobil 1 for a long time in another car, but was looking to make a step up being that the price is maybe $10 more per oil change for one of the boutique oils. If I can protect my baby better for $10 every few months, that's a well spent $10. If anyone can touch on if the boutiques are or aren't better not making a consideration on price, or if they firmly believe in another product such as Mobil 1, that would be great! Thanks


0w40 didn't exist when your engine was designed, let alone this version of it. It will be heavier when it matters than the 10w30 and lighter when it matters than the 20w40.

If the fact that it isn't of the stock spec'd grade, then use their 10w40 or Delvac 1 5w40/Turbo Diesel Truck 5w40. Which is likely overkill.
 
Originally Posted By: OVERK1LL


0w40 didn't exist when your engine was designed, let alone this version of it. It will be heavier when it matters than the 10w30 and lighter when it matters than the 20w40.

If the fact that it isn't of the stock spec'd grade, then use their 10w40 or Delvac 1 5w40/Turbo Diesel Truck 5w40. Which is likely overkill.


Hi,
OVERK1LL - great response!
 
Originally Posted By: Stock92
If anyone can touch on if the boutiques are or aren't better not making a consideration on price, or if they firmly believe in another product such as Mobil 1, that would be great!


I think the Mobil 1 0w-40 idea is about best. It's a good oil at a reasonable price. Up here, I'd be tempted to go for Mobil Delvac 1 5w-40 because I might be able to get it cheaper. As for RP, 0w-40, 5w-40, and 10w-40 are all quality options. However, the Mobil 1 0w-40 would probably be significantly cheaper for you, and certainly doesn't play second fiddle to the other options.
 
I have the 1997 version of this vehicle. Owner's manual calls for a 10W30 but can accommodate a 15W40. I have run Amsoil 10W30 since I got the car 12 years ago and recently switched to a 50-50 mix of Amsoil 10W40 and 10W30. No reason and no change in anything either. The 10W30 was fine, uses no oil, and I go annual changes which turns out to be only about 5000 miles or so. Previous owner used Mobil 1 10W30 and it had 18 months on the oil when I got it but UOA was fine. Don't overthink the oil needed in this thing.VA can get hot as **** in the summmer and I have had no issues with the 10W30.

By the way, unless you do it yourself you are looking at about 800 to replace the timing belt, tensioner and aux belts. Not a fun job on this things. About 1000 if you do the water pump as well. An interference engine.
 
Last edited:
Definitely go with Mobil 1 High Mileage 10w40. Or if you prefer a 30 weight,go with the 10W30 version. It`s cheap at Walmart in their 5 quart jug too.
 
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