New (to me) 2024 Toyota Corolla Oil and Gas Mileage

[wolverine86]

Last week I purchased a 2024 Toyota Corolla LE with about 20K miles on the odometer. I noticed that the owner's manual calls for 0W-8 oil to be used in its M20A-FKS engine. I downloaded an owner's manual used in foreign lands (e.g., Asia, Europe) for the same vehicle, and it specifies that 0W-16, 0W-20, 5W-20, 5W-30, 10W-30 and 15W-40 (the latter two to be used only at higher ambient temperatures) are acceptable recommended oils. Based on that, I plan to change the oil over to 0W-20 synthetic (either Amsoil or Mobil 1) at the next oil change. I'd like to keep oil commonality with my 2008 Honda Ridgeline, which I've run for about 17 years on Amsoil 0W-20 synthetic oil.

My question is this: have any of you done any studies showing the difference in gas mileage between 0W-8 and a thicker viscosity oil, such as 0W-20? If so, what were the results? What, if any, difference in gas mileage is there between the two? I know there are a lot of variables involved and it's probably difficult to do such a study, but realistically is there any improvement in gas mileage using 0W-8 over 0W-20?

BTW, I live in northern Alabama, which means fairly warm/hot weather for 6 months of the year, with temps maxing out at about 100F or so in the heat of summer.

 

[scoot]

I'm not a thicky but where you live I'd go 0w30 all year

 

[JavierH19]

The 0w-8 models use up to 30. The 16 ones go to 40 and the 20 ones go to 50.

I went form 0w-20 to 5w-40 in my suv and I only lost 0.2mpg tank average but there's still plenty of margin of error so it's likely less. 0w-8 is 5 cst and 0w-20 is typically 8 so only 3 cst more. Going from 8 to a normal non euro 5/10w-30 being 10-11 is double or just over. Going from 7-8 cst to 13-14 didn't do anything to me. You could use something like M1 ESP 0/5w-30.

 

[AKhan87]

As long as it doesn't void your warranty, go for it.

 

[wolverine86]

The 0w-8 models use up to 10w-30. The 16 grade ones go to 40 and the 20's go to 50. I went form 0w-20 to 5w-40 and i only lost like 0.2mpg tank average but there's still plenty of margin of error so it's likely less. 0w-8 is 5 cst and 0w-20 is typically 8 so only 3 cst more. Going from 8 to a normal non euro 5/10w-30 being 10-11 is double or just over. Going from 7-8cst to 13-14 didn't do anything to me. You could use something like M1 ESP 0/5w-30.

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Thanks, Javier! Your car seems to be a hybrid, based on the battery voltage and cell spec just above the oil spec. Mine is a non hybrid, but I suspect the difference in gas mileage would be about the same.

 

[JavierH19]

Thanks, Javier! Your car seems to be a hybrid, based on the battery voltage and cell spec just above the oil spec. Mine is a non hybrid, but I suspect the difference in gas mileage would be about the same.

I don't have a hybrid it's just what the document I found had included but it's the exact same for the hybrid and non hybrid engines.

Toyota allows for multiple grade increases because they and anyone who knows anything about engines knows that they aren't made of glass and can just relieve any excess oil pressure.

 

[skyactiv]

Use 0W20 since it allows for it and you want commonality.

 

[kschachn]

Fuel economy difference is about 1% to maximum 2% for most grade changes. Whether that is exactly true for a hybrid I do not know.

Run what you want unless a small consumption decrease is your one and only objective.

 

[fantastic]

0w-8 just hit the shelves like a few weeks ago so probably not many examples to share. I'd imagine a few folks here would go to a "thicker" 0w-20 like you mentioned. Are these engines DI (Direct Injection)?

 

[wolverine86]

0w-8 just hit the shelves like a few weeks ago so probably not many examples to share. I'd imagine a few folks here would go to a "thicker" 0w-20 like you mentioned. Are these engines DI (Direct Injection)?

I think they are direct injection. The Wikipedia description of the M20A series of engines refers to them as having "multi-hole direct injectors". Somebody more knowledgeable about these newer engine designs might be able to shed more light on that. Other than this car, our youngest vehicle is a 2014 Sienna. LOL!

 

[KevinMalone]

No issues running 0w20 and commonality is a great idea. As far as I know, the M20A-FKS specified 0w16 but allowed for 0w20 at launch in North America. And yes, it has D-4S port and direct injection.

I service a relative's E210 Corolla with the same engine and run Kirkland 0w20.

 

[Corollaman]

I own this same car (2024 Corolla le). I'm currently running Mobil ESP 0w30, averaging about 41 mpg highway 35 mpg combined about the same as the car was rated for on 0w8. I've noticed no difference in fuel economy between 0w8, 0w20, and now 0w30. I'll probably just stick with the Mobil 0w30 ESP unless I change my mind, again.

 

[SC Maintenance]

I read years ago an interview with Toyota design engineers when they went to 0W-16. I believe they stated 3%. Thats huge for an OEM. For an owner, its nothing.

Also it depends on a certain set of conditions. The new Toyota Dynamic force have variable oil pumps that drop down under low load conditions anyway, so any savings you might have gotten on the thinner oil are probably more so when your in full load / full oil pump mode. If your running constant low load conditions - like you drive on 55mph roads a lot or what not, likely makes much less difference.

I am running 5W-30 in my 0w-16 spec'd Dynamic Force 2.5.

 

[Hohn]

I’d consider commonizing on a 20 grade, but probably a 10w20 from HPL.

I think 10w or even 15w is plenty of winter capability in your area.

One intriguing option available to you Southerners would be a straight grade HPL oil like an SAE30. The SAE 30 will test out as being roughly a thin 15w, so you’ll essentially have a No-VII 15w30 with super low volatility (important for GDI) and zero shear.

I’m willing to bet that if run primarily on the highway in Northern Alabama, the HPL SAE30 could go 20k miles and still look pretty dang good, and do it with incredibly low volatility and amazing engine cleanliness.

 

[meep]

Keep in mind, at least in the 0-20, Toyotas own motor oil is said to be on the thicker side of the viscosity range. A 0-20 TGMO may be near overlapping with 5-30 penzoil. TGMO is a full synthetic, probably a group III, manufactured by Exxon Mobil. I’ll have no problem staying with their oil at least through warranty, and possibly longer.