I have a 2007 Toyota Yaris with a little over 30,000 miles on it. Over the past year or so I’ve noticed some slight pinging when getting up to speed on the highway or climbing hills, but since last week the engine began pinging more frequently and a little more noticeable than before (maybe a bad ba…

No, using higher octane will absolutely never hurt your engine. But yours is the only situation where it is a good idea to go higher than the recommended octane. It never hurts anything but the wallet, but it’s usually pointless. That said, if you’ve got pinging in a car that new, either you got …

Thanks for the response. Some additional information: Before I put mid-grade in the tank, the pinging would occur between 1000-2000 RPMs under moderate or heavy load and it doesn’t seem to matter if the engine is cold or running at normal temperature. Once the engine starts spinning closer to 2500-…

Using higher octane fuel won’t hurt you motor. I’m glad the pinging is gone. However I’d advise against lugging the motor, because that will hurt your motor. Shifting to a higher gear and keeping the rev’s down is a good way to max your mpg, but with the small motor in your car you have to balanc…

Out of curiosity, what grade of fuel does Toyota recommend in your owner’s manual? I suspect it’s probably regular (87) but just checking.

Toyota recommends 87 octane in the Yaris, if it has four speeds, it has an automatic transmission. The manuals are 5 speed. Make sure the EGR is working normally. When the EGR valve fails in a closed position, you get detonation at cruise and lower mpg.

Is this engine supposed to have its spark plugs changed at 30k miles? Is the Powertrain Warranty still in effect? If a car this new is pinging, unless there is truly a “bad fuel” issue, that situation indicates either a need for maintenance or a need for repair. Check the Toyota Maintenance Sche…

Everyone here is making the assumption that car engines are built with the precision of a Swiss watch…They are not…Your engine, for whatever reason, could have it’s compression at the upper limit or the ignition timing control/knock sensor is a little out of whack. Changing the knock sensor MIGHT he…

That’s funny, I’ve had EGR problems cause a knock at light acceleration before.

That’s what I’ve been doing. It’s an automatic transmission (I think you’re under the impression its a manual), so when I have it in drive the transmission likes to stay in high gear and the torque converter coupled even when I’m trying to go uphill or get up to speed. For instance, I could be accel…

Will using a higher octane damage my engine?

General Discussion

texases November 29, 2009, 7:14pm 9

In addition to the others’ good advice, this is one situation where I’d run a full dose of a fuel system cleaner through it (like Techron, read the lable so see how much). I’d also try Shell gas for a while to see if it cleans out some deposits. Cheap, may help.

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Will using a higher octane damage my engine?

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