Gas Octane Level, does it matter?
Modern cars don't really NEED as much break in ritual as the older cars. They are built with better materials, better (not necessarily closer) tolerances, design and quality control. That's not to say you should take delivery of a new car directly from the dealership to the drag strip and flog it all day. I took delivery of my 09 sedan Oct a year ago at around 11:00 AM and left for a 1200 mile trip to NY at around 3:00 PM the same day. I didn't get on the interstate in FL and see how fast I could do the trip though. I stayed on US 1 till I got to Atlanta. Parked the car at a motel (normally I do the trip non stop in less than 20 hours with the dog slowing me down a little) and got on the interstate the next day. The rest of the way I varied my speed from 50 to 70 without running at a constant speed for the rest of the trip. I also took many time outs to let the dog take a leak. When I got to my destination, Albany, NY, I did an oil change and that was the extent of my "Break in period". My car starts on the second or third rotation every time, idles as smoothly as a GM tuned 4 cyl car with full bolt-ons can be expected to idle and puts a big smile on my face every time I nail it.
I think you said what I was trying to say but you did it in far fewer words. To explain why the rings won't seat. At slower speeds the cylinders get washed down more by residual gasoline and are more likely not to seat properly. Higher speeds limit this more. Running the car at varying speeds, run up to 70 - 80 then releasing the throttle and coasting back down to a more reasonable speed allows the valve stems to seat better in the guides by the process of low manifold vacuum to high manifold vacuum and back and forth. Low vacuum (or negative boost if you want to call it that, it"s actually a higher number higher numerically) tends to pull oil away from the guides while high vacuum (or boost in a SC or TC car) tends to move the oil towards the guides.
pshhhh...I dont mind the 20 cents extra for gas.. Im lazy and pay the $100 at a jiffy lube or Mr. Goodwrench to get my oil changed, lol. money has not ceilings here when it comes to car care. except for those damn breaks
I dont have time for those yet. nor the cash
. I say we throw them all into the same bucket
In Northridge there's a gas station at the corner of Nordhoff and Corbin that sells Trick gasoline at the pump. 102 octane, baby (or rather, 97 as calculated by R+M/2).
Never tried it yet. Maybe one of these days I'll pour a tank of it in and see how she runs.
Never tried it yet. Maybe one of these days I'll pour a tank of it in and see how she runs.
Unless the Trifecta tune completely turns off the knock sensor he should be good till he gets some 93 in the tank. As long as he doesn't flog the thing. Knock is also known a pre-ignition which is when the incoming charge ignites too early before the piston gets to top dead center (TDC), or too far advanced. Too much pre-ignition is an engine killer. The knock sensor detects this knock and retards the ignition timing to protect the engine. As long as he doesn't flog the **** out of it he should be good till he gets some 93 in it. As soon as the gas gauge gets to 3/4 fill it with 93 and keep doing that 4 or 5 times. That will build the octane level a little at a time till it eventually gets to pure 93. I would NOT use an off the shelf octane enhancer. Or ANY other additive in my engine. Ever heard of snake oil? Draining the tank is WAY, WAY too much overkill. If the tune increases the advance so much they MUST remove the knock sensor and DOES remove the knock sensor protection I don't want a Trifecta tune.
That is in no way the case. My dad had to drive my car while I did some work to his truck and he accidently put 87 in like he typically does in his truck. I babied it down to a half tank and refilled it with 93. I am going to ease through this tank and hope for the best. Thanks for all the helpful information.
save your money unless you're going to tune...
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