Old car guy with new car question - Toyota Yaris Forums

Sekkyoshi · 10-21-2015, 06:49 PM

Will premium gas effect my 13 yaris negatively?
Are there any warnings for this car and e85 gasoline?

It may sound like an obvious question but I've never owned anything WITHOUT a carburetor. This is a whole new world for an old mechanic. I always ran premium in my 1977 280z and all of my 1980s Corollas because of a slight improvement in gas mileage hand slightly reduce wear and tear on motor parts.

IllusionX · 10-21-2015, 07:02 PM

The slight improvement is probably due to the lack of ethanol in the fuel. But I doubt its not financially economic to run premium fuel on the Yaris.

Don't put e85 in there... The engine isn't made for it.

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Sekkyoshi · 10-21-2015, 07:46 PM

Yeah, premium is pricey but i build my own motors. Hey thanks you, i almost tried e85 the other day

CoryM · 10-21-2015, 11:53 PM

Premium tends to leave deposits on the pistons etc from the additives. Some of these aren't great, but not critical. If you are used to premium, and want to continue to run it, go for it. But I'd also suggest trying it on 87 for a while and see if it's a big enough difference to justify the cost. Toyota isn't very aggressive with their timing control, so you won't notice too much of a difference in fuels (whereas in a GM you will notice almost immediately.).

Welcome to the modern world of EFI ;) I've spent a lot of years messing with carbs and I do not miss them at all.

Cheers.

Kalispel · 10-21-2015, 11:57 PM

Quote:

Originally Posted by Sekkyoshi

Yeah, premium is pricey but i build my own motors. Hey thanks you, i almost tried e85 the other day

My 2015 Yaris has a bold warning label on the inside gas hatch area to NOT use e85 fuel in this vehicle. Since all Yaris sold in the USA have used the same tried-and-true engine, that applies to 2007-2014 versions of the Yaris as well.

IllusionX · 10-22-2015, 11:39 AM

Quote:

Originally Posted by Kalispel

My 2015 Yaris has a bold warning label on the inside gas hatch area to NOT use e85 fuel in this vehicle. Since all Yaris sold in the USA have used the same tried-and-true engine, that applies to 2007-2014 versions of the Yaris as well.

And 1999-2005 echos as well. Same engine 17 years.

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10-21-2015, 06:49 PM	#1
Sekkyoshi Drives: 2013 yaris Join Date: Oct 2015 Location: Us Posts: 6	Old car guy with new car question Will premium gas effect my 13 yaris negatively? Are there any warnings for this car and e85 gasoline? It may sound like an obvious question but I've never owned anything WITHOUT a carburetor. This is a whole new world for an old mechanic. I always ran premium in my 1977 280z and all of my 1980s Corollas because of a slight improvement in gas mileage hand slightly reduce wear and tear on motor parts.

10-21-2015, 07:02 PM	#2
IllusionX It's the illusion you see View User's Garage Drives: 07 Yaris Sedan Aero Join Date: Oct 2006 Location: Brossard, QC Posts: 3,888	The slight improvement is probably due to the lack of ethanol in the fuel. But I doubt its not financially economic to run premium fuel on the Yaris. Don't put e85 in there... The engine isn't made for it. Sent from my A0001 using Tapatalk __________________

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10-21-2015, 07:46 PM	#3
Sekkyoshi Drives: 2013 yaris Join Date: Oct 2015 Location: Us Posts: 6	Yeah, premium is pricey but i build my own motors. Hey thanks you, i almost tried e85 the other day

10-21-2015, 11:53 PM	#4
CoryM Drives: 2009 5-door, 5-speed Join Date: Sep 2011 Location: White Rock BC Posts: 687	Premium tends to leave deposits on the pistons etc from the additives. Some of these aren't great, but not critical. If you are used to premium, and want to continue to run it, go for it. But I'd also suggest trying it on 87 for a while and see if it's a big enough difference to justify the cost. Toyota isn't very aggressive with their timing control, so you won't notice too much of a difference in fuels (whereas in a GM you will notice almost immediately.). Welcome to the modern world of EFI ;) I've spent a lot of years messing with carbs and I do not miss them at all. Cheers.