Which engine oil having high level of resist to fuel dilution

[Pablo]

Orly nao

0W-8 engine oil is primarily used in certain hybrid models from Toyota and Mazda, particularly those prioritizing fuel efficiency and low emissions. Examples include the Toyota Corolla Hybrid, Toyota Crown with 2.5-liter Hybrid engine, Grand Highlander Hybrid, and the Mazda 2 Hybrid (sold in overseas markets).

Used in vs designed for

 

[I<3oil]

Used in vs designed for

Yeah, those engines were designed for that. Thanks for agreeing.

 

[Pablo]

Yeah, those engines were designed for that. Thanks for agreeing.

If you say so. Is there documentation of this? I remain open minded.

 

[I<3oil]

If you say so. Is there documentation of this? I remain open minded.

To be fully transparent and completely honest, I don't care if you believe it or not. It does absolutely nothing for me if you believe it or not. /shrug

 

[Pablo]

To be fully transparent and completely honest, I don't care if you believe it or not. It does absolutely nothing for me if you believe it or not. /shrug

I’m not understanding why the attitude?

 

[I<3oil]

I’m not understanding why the attitude?

There's no attitude, sir. I just could not care less if you believe it or not. That's all. /hug

Bout to go to Sam's Club and get groceries with my kids, drinking coffee. It's a good day!

 

[ARB1977]

I’m about to give Amsoil Euro 0W30 a go in the Pilot. Oils before this was SS 0W20 for 95%of its life. The last three were SS 0W30, twice and current XL 5W30. All changed at 15% OLM about 5500-6000 miles. It does a far share of idle time. The oil doesn’t seem to rise on the dip stick much. VCM is disabled.

 

[Jetronic]

Is there any logic in moving up a grade? Fuel dilution occurs when fuel gets past the rings, so if there is thicker oil in the ring lands, can that slow the passing of oil into the crankcase?

yes it does. the fuel doesn't migrate on it's own, it forms a new mixture with the oil already there. If you can slow down the migration down enough, at least the lighter components of the fuel, if not all of them, heat up and evaporate out.

 

[Jetronic]

Higher viscosity is not the solution because I cannot believe that viscosity loss is the only harm that fuel does

It is not. fuel consumes the anti-oxidants faster and if the contamination leads to increased oil levels, the concentration of additives drops aswell.

 

[Revving2Redline]

The question has been asked many times and the general consensus seems to be there is no such oil, but you can use a thick-for-grade euro oil or step up one SAE viscosity grade to compensate to some degree for the thinning effect the fuel will have when mixed into the oil. What that doesn't do is also compensate for the negative chemical interactions between what's in the fuel and what's in the oil, which is why extended oil change intervals much beyond 5000 miles are usually not recommended in engines that regularly suffer from dilution over, say, 2-3%.

The follow up question is usually "didn't the OEM account for dilution when they specified (recommended) the oil grade?"; we know from public records that OEM's must specifiy thinner oils to avoid government fines. Theoretically the OEM probably did engineer the engine to operate with dilution and thinner, ILSAC type oils. However it was likely done as a caluclated compromise to some amount of engine durability/longevity. Whether that compromise has a tangible impact on the vehicle's (not just the engine's) longevity seems to be up for debate. Furthermore, as seen with the recent 6.2L GM issues, unless manufacturing quality control is tight, what might've been a minor issue can be magnified and exacerbated when running on the bleeding edge of minimum frictional losses (thinner oils).

Furthermore, as seen with the recent 6.2L GM issues, unless manufacturing quality control..

Quality and GM in the same sentence alone is a oxymoron . But its safe to say its business as usual up in Detroit.

 

[Sienna dude]

It is not. fuel consumes the anti-oxidants faster and if the contamination leads to increased oil levels, the concentration of additives drops aswell.

Exactly, and the only solution is to change the oil religiously

 

[4WD]

Furthermore, as seen with the recent 6.2L GM issues, unless manufacturing quality control..

Quality and GM in the same sentence alone is an oxymoron . But its safe to say its business as usual up in Detroit.

With so many other comedians not making the cut …

 

[Jetronic]

Exactly, and the only solution is to change the oil religiously

except if higher viscosity can keep fuel dilution down.

 

[Sienna dude]

except if higher viscosity can keep fuel dilution down.

How can higher viscosity keep the amount of fuel down?

 

[Revving2Redline]

With so many other comedians not making the cut …

Im not trying to laugh about it. Truthfully its sad and maybe downright pitiful. Hopefully they get it fixed, but a betting individual isnt going to risk a lot on things changing with them.

 

[Revving2Redline]

How can higher viscosity keep the amount of fuel down?

Wont keep the fuel down, just make it harder to dilute.

 

[Sienna dude]

Wont keep the fuel down, just make it harder to dilute.

I don't think so. All it does is start thicker and stay thicker. Higher viscosity cannot do anything more than that. 3000 miles on 0w16 is safer than 10,000 miles on 0w30 if you have a fuel diluter. You just cannot give fuel a lot of time to sit in the oil pan.

 

[rstcso]

I’m about to give Amsoil Euro 0W30 a go in the Pilot. Oils before this was SS 0W20 for 95%of its life. The last three were SS 0W30, twice and current XL 5W30. All changed at 15% OLM about 5500-6000 miles. It does a far share of idle time. The oil doesn’t seem to rise on the dip stick much. VCM is disabled.

I have a new Pilot and running Amsoil SS 0w-20. I understand the switch to 0w-30 SS, but why switch to the Euro blend? Thanks

 

[Pablo]

I don't think so. All it does is start thicker and stay thicker. Higher viscosity cannot do anything more than that. 3000 miles on 0w16 is safer than 10,000 miles on 0w30 if you have a fuel diluter. You just cannot give fuel a lot of time to sit in the oil pan.

Linear thinking

 

[Starving Electrician]

Run a thicker oil than what is specified, avoid short trips, live in a warm climate (the faster the engine gets warm the less dilution you get), change the oil at 4,000 or less miles, and you will never have an issue even with an engine known for dilution. I know this because I have a Honda Civic with the 1.5 liter a known problem child. It has 150,000 miles on it and has never had any noticeable amount of fuel dilution in any of my UOA's for it.