Amsoil Racing 15W-50
- Thread starter Balla
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Not much in the way of AW additive other than the elevated level of ZDDP.
This is one very heavy oil with a HTHSV of 5.6cP and low 158 VI:
http://www.amsoil.com/lit/databulletins/g2570.pdf
It's much heavier than M1 15W-50 (HTHSV 4.5cP) and even Castrol TWS 10W-60 (HTHSV 5.3cP, VI 168).
I can't really see an application for this oil, and certainly not for any Porsche where nothing heavier than M1 5W-50 (HTHSV 4.4cP) is recommended.
This is one very heavy oil with a HTHSV of 5.6cP and low 158 VI:
http://www.amsoil.com/lit/databulletins/g2570.pdf
It's much heavier than M1 15W-50 (HTHSV 4.5cP) and even Castrol TWS 10W-60 (HTHSV 5.3cP, VI 168).
I can't really see an application for this oil, and certainly not for any Porsche where nothing heavier than M1 5W-50 (HTHSV 4.4cP) is recommended.
I am trying to compare it to: M1 15W50 & Verado 25W50
Here's a Verado 25W50 VOA(Mercury Marine)
https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2629378#Post2629378
Here's a Verado 25W50 VOA(Mercury Marine)
https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2629378#Post2629378
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According to the MSDS the Mercury Verado semi-syn oil has a KV40 of 206cSt which is very high. If correct this translates into an oil with a VI of only 92. There are straight 50wt oils with VI's higher than that not to mention most 20W-50 dino's.
IMO this oil is unsuitable for a modern Auto engine.
You haven't mentioned what you plan to use this oil for?
IMO this oil is unsuitable for a modern Auto engine.
You haven't mentioned what you plan to use this oil for?
Originally Posted By: CATERHAM
I can't really see an application for this oil,
Quote:
APPLICATIONS
AMSOIL Dominator Synthetic 15W-50 Racing Oil is recommended for high-rpm, high-horsepower, turbo/supercharged, gasoline- or alcohol-burning, nitro-fueled or nitrous oxide gas-injected applications operated under severe conditions.
Applications include, but are not limited to, the following:
• Asphalt Late Model • Dirt Late Model • Modified Big Block • Ford Crate Late Model • Dodge Crate Late Model • Endurance • Rally • Sprint • Truck-Pull • Aluminum Block • Marine • Other high-performance racing and street applications requiring 50-weight oil.
I can't really see an application for this oil,
Quote:
APPLICATIONS
AMSOIL Dominator Synthetic 15W-50 Racing Oil is recommended for high-rpm, high-horsepower, turbo/supercharged, gasoline- or alcohol-burning, nitro-fueled or nitrous oxide gas-injected applications operated under severe conditions.
Applications include, but are not limited to, the following:
• Asphalt Late Model • Dirt Late Model • Modified Big Block • Ford Crate Late Model • Dodge Crate Late Model • Endurance • Rally • Sprint • Truck-Pull • Aluminum Block • Marine • Other high-performance racing and street applications requiring 50-weight oil.
Originally Posted By: Balla
Mercury Verado 250hp Outboard. Inline 6 24-valve direct acting double overhead cam (DOHC)
Looks like it's a very suitable substitute.
Mercury Verado 250hp Outboard. Inline 6 24-valve direct acting double overhead cam (DOHC)
Looks like it's a very suitable substitute.
I though it would have less Calcium. Which one of the detergents was bad for detonation???
Maybe it's more to counter balance the zddp in there.
Can someone let me know if I'm right?
Maybe it's more to counter balance the zddp in there.
Can someone let me know if I'm right?
Originally Posted By: tudorart
I though it would have less Calcium. Which one of the detergents was bad for detonation???
Maybe it's more to counter balance the zddp in there.
Can someone let me know if I'm right?
Magnesium detergents are supposed to be the ones that lead to detonation and preignition. They leave harder deposits in the combustion chambers than calcium detergents.
I though it would have less Calcium. Which one of the detergents was bad for detonation???
Maybe it's more to counter balance the zddp in there.
Can someone let me know if I'm right?
Magnesium detergents are supposed to be the ones that lead to detonation and preignition. They leave harder deposits in the combustion chambers than calcium detergents.
Originally Posted By: addyguy
Thanks for running this - it's actually a LOT thinner than a thought it would be - it's barely a 50-weight.
The spec is 16.3. This is 17.2, and Amsoil data says 17.5. Barely? Interesting. Lower side, but I wouldn't say barely. Not so far away from the specified oil.
Thanks for running this - it's actually a LOT thinner than a thought it would be - it's barely a 50-weight.
The spec is 16.3. This is 17.2, and Amsoil data says 17.5. Barely? Interesting. Lower side, but I wouldn't say barely. Not so far away from the specified oil.
Originally Posted By: addyguy
Doesn't 50-grade START at 16.8cst, not 16.3?
You are right, Pablo - I thought Dominator 15W-50 was like 18.5 or 19 cst@100C.
A meaningless observation since Amsoil provides the HTHSV of 5.6cP which trumps the KV100 spec'. This is one very heavy oil and the oil pressure will be way higher than the M1 15W-50 (HTHSV 4.5cP) that the OP made reference to.
Doesn't 50-grade START at 16.8cst, not 16.3?
You are right, Pablo - I thought Dominator 15W-50 was like 18.5 or 19 cst@100C.
A meaningless observation since Amsoil provides the HTHSV of 5.6cP which trumps the KV100 spec'. This is one very heavy oil and the oil pressure will be way higher than the M1 15W-50 (HTHSV 4.5cP) that the OP made reference to.
I have run this oil in my car on track days, my 850 hp blown BBC boat motor and my stroker small block.
I only UOA'd the boat and the stroker, both came back stellar. This is a great oil for high performance engines that rev hard.
I only UOA'd the boat and the stroker, both came back stellar. This is a great oil for high performance engines that rev hard.
Originally Posted By: SteveSRT8
This is a great oil for high performance engines that rev hard.
And that require a very heavy oil due to very high oil temperatures and/or massive fuel dilution resulting in oil pressure issues. If that's not the case then something lighter that still maintains adequate oil pressure would be more apropriate.
For the OP, what is the specified oil for this engine?
This is a great oil for high performance engines that rev hard.
And that require a very heavy oil due to very high oil temperatures and/or massive fuel dilution resulting in oil pressure issues. If that's not the case then something lighter that still maintains adequate oil pressure would be more apropriate.
For the OP, what is the specified oil for this engine?
Originally Posted By: CATERHAM
Originally Posted By: SteveSRT8
This is a great oil for high performance engines that rev hard.
And that require a very heavy oil due to very high oil temperatures and/or massive fuel dilution resulting in oil pressure issues. If that's not the case then something lighter that still maintains adequate oil pressure would be more apropriate.
For the OP, what is the specified oil for this engine?
Mercury Verado 25W-50 Outboard Oil.
Originally Posted By: SteveSRT8
This is a great oil for high performance engines that rev hard.
And that require a very heavy oil due to very high oil temperatures and/or massive fuel dilution resulting in oil pressure issues. If that's not the case then something lighter that still maintains adequate oil pressure would be more apropriate.
For the OP, what is the specified oil for this engine?
Mercury Verado 25W-50 Outboard Oil.
Okay.
The Mercury Verado 25W-50 website mentions a higher HTHSV compared to a popular synthetic oil (possibly M1 15W-50), but they don't actually provide the spec'.
I'd contact them to find out what the actual HTHSV spec' is. Once you know what it is you'll be able to more precisely choose an alternative oil of the appropriate viscosity.
I'd also ask what the KV40 and KV100 spec's are as well. It's hard to believe the VI is only in the 90+ range.
The Mercury Verado 25W-50 website mentions a higher HTHSV compared to a popular synthetic oil (possibly M1 15W-50), but they don't actually provide the spec'.
I'd contact them to find out what the actual HTHSV spec' is. Once you know what it is you'll be able to more precisely choose an alternative oil of the appropriate viscosity.
I'd also ask what the KV40 and KV100 spec's are as well. It's hard to believe the VI is only in the 90+ range.
The Dominator oils comparable to Red Line's oils. Extremely shear stable. No VM'ers. The Dominator oils get good reviews from most users.
Mobil's 15w50 HT/HS is much lower than it used to be. I think RL's 5w40 has a higher HT/HS than M1 15w50.
Mobil's 15w50 HT/HS is much lower than it used to be. I think RL's 5w40 has a higher HT/HS than M1 15w50.
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