VOA - Mobil 1 ESP 0W-30

[kschachn]

Detonation is initiated and propagated by a shock wave. That's how high explosives work as opposed to low explosives.

Just as in your long list above there is considerable confusion between pre-ignition and detonation (and LSPI).

 

[RDY4WAR]

Detonation is initiated and propagated by a shock wave. That's how high explosives work as opposed to low explosives.

Just as in your long list above there is considerable confusion between pre-ignition and detonation (and LSPI).

Detonation is when the auto-ignition point of the air/fuel mixture is reached prior to the flame front reaching it causing a sudden spike in cylinder pressure. Pre-ignition is essentially the same thing except the fuel is ignited and burning (rather than sudden combustion) prior to the spark or flame front.

Octane is a measure of the auto-ignition point of the end gases (and nothing else) thus directly related to both pre-ignition and detonation. However, it's not the only fuel parameter than affects pre-ignition and detonation. How well the fuel readily vaporizes and how much heat it pulls out of the intake air in the process are as much a factor. It's how E85 at ~100 octane, with +400% higher HoV, has similar detonation and pre-ignition resistance as 116+ octane race fuel. Similarly, 93 octane gasoline with 10% ethanol is more detonation / pre-ignition resistant than 93 octane non-ethanol fuel.

This is the problem with GDI. With the fuel injected directly into the cylinder just prior to ignition, there's no time to properly vaporize and cool the mixture thus much of the knock resistance from the fuel's HoV is nullified.

 

[kschachn]

Detonation is when the auto-ignition point of the air/fuel mixture is reached prior to the flame front reaching it causing a sudden spike in cylinder pressure. Pre-ignition is essentially the same thing except the fuel is ignited and burning (rather than sudden combustion) prior to the spark or flame front.

Octane is a measure of the auto-ignition point of the end gases (and nothing else) thus directly related to both pre-ignition and detonation. However, it's not the only fuel parameter than affects pre-ignition and detonation. How well the fuel readily vaporizes and how much heat it pulls out of the intake air in the process are as much a factor. It's how E85 at ~100 octane, with +400% higher HoV, has similar detonation and pre-ignition resistance as 116+ octane race fuel. Similarly, 93 octane gasoline with 10% ethanol is more detonation / pre-ignition resistant than 93 octane non-ethanol fuel.

This is the problem with GDI. With the fuel injected directly into the cylinder just prior to ignition, there's no time to properly vaporize and cool the mixture thus much of the knock resistance from the fuel's HoV is nullified.

Absolutely an EtOH mixture can detonate due to the oxygen on the molecule. I think we are arguing over a technical definition of detonation rather than one that’s more specific to an ICE. In my definition there isn’t any real burning/ignition in detonation since there isn’t time for chemical combustion to occur. The shock wave is too fast and if there isn’t oxygen on the molecule already then it really can’t detonate.

Nevertheless I may still be wrong but thanks for the discussion.

 

[ChrisD46]

I did not see where the Mobil 1 0W30 PDS showed a starting viscosity number (I’m guessing 160 or so) ?

 

[fantastic]

I did not see where the Mobil 1 0W30 PDS showed a starting viscosity number (I’m guessing 160 or so) ?

Shows two viscosity numbers under properties.

12.2 @100c
63 @40c

https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/products/mobil-1-esp-0w-30#:~:text=Product Data Sheets (PDS) Safety Data

Unless you're talking about Viscosity Index?

VI: 180

According to the two sources below:

http://weblink.carquest.com/acl/?mfgName=MOB&partNumber=47104

https://www.oreillyauto.com/detail/...ynthetic-motor-oil-0w-30-1-quart/mob9/1030esp

 

[ChrisD46]

Shows two viscosity numbers under properties.

12.2 @100c
63 @40c

https://www.mobil.com/en/lubricants/for-personal-vehicles/our-products/products/mobil-1-esp-0w-30#:~:text=Product Data Sheets (PDS) Safety Data

Unless you're talking about Viscosity Index?

VI: 180

According to the two sources below:

http://weblink.carquest.com/acl/?mfgName=MOB&partNumber=47104

https://www.oreillyauto.com/detail/...ynthetic-motor-oil-0w-30-1-quart/mob9/1030esp

My bad ! … I meant VI (which is the 180 number) . That’s on the higher side as I don’t think I’ve seen a VI number that high before ?

 

[fantastic]

My bad ! … I meant VI (which is the 180 number) . That’s on the higher side as I don’t think I’ve seen a VI number that high before ?

I agree that it's on the higher side but not impossible. I've seen full synthetics reach over 200 VI. Unfortunately, I don't know how old that information is but Oreilly's & Carquest would've just posted what they saw. Two different competing companies posting the same info strengthens the truthfulness but it may of been for a previous version of this oil too. IDK LOL

 

[Kennedy01]

Not trying to resurrect a dead thread, but the cst@100 c puts this as practically being a 40 grade oil. Looking like it would be a good mixed fleet oil plus OPE.

 

[kschachn]

Not trying to resurrect a dead thread, but the cst@100 c puts this as practically being a 40 grade oil. Looking like it would be a good mixed fleet oil plus OPE.

Yeah it’s because the approval required HT/HS can span the grades.

 

[tblt44]

I appreciate the validation. Since the PDS also states that it is "fully compatible with the latest Diesel Particulate Filters (DPF's) and Gasoline Catalytic Converters (CAT's)", I have no concerns about catalytic converter "poisoning", though, of course, my 2.7 is not burning oil.

This is one of the most robust xW-30 oils on the market and I grabbed 100K worth of oil changes. My 2.7 trounced the Motorcraft 5w30 in only 1K miles, however, ESP holds up very well by maintaining viscosity throughout the OCI.

2.7 what ?
I see a lot of hype over this zero thirty e s p oil.
Makes me wanna try it in my old 5.3 GM with 250000 miles on it.

 

[2.7ecoboostFordBronco]

2.7 what ?
I see a lot of hype over this zero thirty e s p oil.
Makes me wanna try it in my old 5.3 GM with 250000 miles on it.

He’s using it in a 2.7 Ecoboost Ford Bronco.

Here are his used oil analysis with it