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there are many forums other than this one... google "Costco gas knock" and see what comes up...

again, "top tier" just means it has a certain detergent package Costco has has had a bad reputation on the forums for years, especially with supercharged cars

F150 isn't the same engine or programming....

Should be getting an oil change by now anyway

No, but a lot of people have found certain brands of gas "93" to show knock on their cars when others don't I know I am getting decent gas from either Sunoco or Mobil so that's the only places I get it from. I don't have a Costco membership but I don't get gas from Kroger or Speedway.

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You said you don't have to be careful with Costco gas. But you should still make sure it's performing like the octane you're expecting out of it.

Top Tier sticker just means it has a qualifying detergent blend. It doesn't mean anything about the octane. It only tests for deposits. I can't see how the previous poster's gas gauge failure was nothing more than coincidence, though.

I remember as a teenager I would borrow my dads car, it had a 350 from a 1978 Corvette, he always told me to put premium in it... 180hp, 8.5:1 compression, what a waste of $ that was! Should have just put 87 in it. Oh well, it was barely $12 to fill it up back then anyway.

Adding a catch can wouldn't cause your mileage to go down.

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Weren't you just asking about drag radials? Would be counter productive to run Ohlinhms if you're looking for any kind of 1/4 mile performance

@DaveRamsey

Numbers are fishy when there's a trade

what did the discounts stack up like? Or did they just straight drop the price?

Wait, so you sit there in your driveway and let it cold idle because then your neighbors won't get mad at you?

5W or 0W doesn't need any warmup time to put it in drive. Some ridiculousness going on.

Edited the post, it was the S550 numbers

It made 3 hp peak.... However, the X pipe (blue line) makes more power through most of the graph, especially on the low-end like the increase the H pipe supposedly gave. " butt dyno certified improvement in low end torque " On the S550 test in that video, the X pipe made 6hp more throughout...

It's quieter so it feels faster/stronger. Put it on an actual dyno and you will see...zilch improvement Transmission shifting smoother now? :cwl: