Re: Why do so many new cars ping...

Craig's Saab C900 Site · 2006-02-21T22:30:21+00:00

Why? All you need to do is run it on the correct grade of fuel. My Saab'shave 8-valve engines that were designed to run on leaded fuel originallywith a 97 octane rating. LRP when it was available was the same rating. NowLRP isn't available I use conventional 98 octane fuel like Optimax,Vortex-98, etc. and put in the right amount of Flashlube every couple oftankfills.Yes it's more expensive that run-of-the-mill 92 octane ULP, but the cleanerburning characteristics of the higher grade fuels plus the fact the enginesare designed to use those fuels means that vehicles designed for use withhigher-grade fuels will run fine providing that's what the owner stickswith.How does this debate go now that Shell, etc. are starting to sellethanol-mix fuels which are given an octane rating of 100? 8-)Craig.

Feb 21, 2006 22 Replies

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Craig's Saab C900 Site 20 years ago

Engines without a knock sensor are designed not to need one IMHO. 8-) Knock sensors are only used because we 'have to use an ECU' to run any modern engine...

Craig.

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Craig's Saab C900 Site 20 years ago

Only a PIMP drives a PINK car. lol.

Craig.

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John Henderson 20 years ago

Yes, but that design doesn't mean they don't need one. An unanticipated build-up of engine deposits (oil detergent residues eg.) can have an engine pinging away merrily.

John

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