My previous car, an '04 TL, wa using regular 87 octane gas and ran
great. I just got a new TL with the SH-AWD and the manual states it
requires premium, and regular gas can damage the engine. So there
goes using 87 octane. If I use 89 octane am I at risk of damaging the
engine? I would like to use 89 octane and see how my car performs and
then change to premium if need be, but not if it can do any damage.
My dad was grumbling about his MDX and premium fuel, and I did the math
for him--and over the last 20 months, he's spent an extra $200 using
When I pointed that out to him that way, he realized that it really
wasn't enough of a difference to worry about.
On Wed, 29 Dec 2010 07:44:11 -0500, "Elmo P. Shagnasty"
My Dad tell's me I'm crazy and the company doesn't know what they're
talking about. LOL. He doesn't understand hi-compression, knock
sensors, computer controlled retard. His idea of preventive
maintenance on an engine is to replace the belts when they actually
break, the hoses when they blow and the plugs whent he center and
ground electrodes no longer exist. Interference engine? What the
hell is that? LOL I pointed out that using the recommended premium
fuel for the life of the car comes to a small fraction of the probable
cost of a new engine should I blow a piston under load and that using
regular would mean I'd have to drive on egg shells even in emergencies
where I should just be standing on the pedal to get out of trouble.
And even then, I could hole a piston if a knock sensor went bad or the
computer couldn't react fast enough if knock was sensed.
My 2005 TL requires at least 91 octane. That and better is what I
Still, it's a personal choice to bet the sensors and computers will
protect the engine, if you want to go the 87 or 89 octane route.
Next visit, I'll introduce him to the requirement that tires need to
be replaced when 6 years or older, even if they still have most of
their tread. You can guess his response to that.
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