break in

Does a 3k mile 5.0 sound different at 9k miles? I test drove two stock 2014 Mustang GTs. One had 9k mikes and the other 3k miles. The 9k GT sounded great and healthy. All I heard was the growl and rumble of the Coyote. The 3k GT sounded different compared to the 9k. I heard an additional sound...

So I just got my new 2012 V6(base, auto, kona blue) for two days and it had 11 miles when I bought it. I've heard about breaking in a new car, like I shouldn't take it hard in the first 100 miles or so and I pretty much followed it by not exceeding 2000 RPM. But I just couldn't hold on driving...

Hi, I'm new to the forums still. I have a 1968 mustang that was swapped to a 302 2 owners before me. that owner also rebuilt the engine to a much higher performance engine. I have just performed a rebuild on it myself and am coming to the point where i will start it up. but i need oil. i have...

This is my first post, so I'm a newbie here. When I bought my 2011 BMW, the manual indicated not to exceed 80 mph or 4K rpm for the first 500 miles (I think it was 500 miles, maybe it was more.) The BMW now has 5800 miles on it. I'm bored to death with it. It's a very nice car, but it gives me...

I recently had my 1966 289 rebuilt and balanced. It has a new RV cam, Edelbrock 1406 carb and performer intake, as well as the 4bbl style pistons. It was originally a C-code and this was its first rebuild. I had the C4 transmission rebuilt while the engine was out as well. I haven't driven...

Hey guys, So the 289 (and c4) in my 66 coupe was just rebuilt and we got it put back in the car a couple weeks ago. Every time we have started it since then, the initial noise during and right after cranking is this grinding noise. Its not a very loud grinding just loud enough to cause me to...

Hey guys, So I'm putting in the rebuilt 289 in my 66 tomorrow and I know the procedure for how to break in the cam but I've got a question. Not only is the engine rebuilt, but the pumpkin in the rear is new also and that has its own break in procedure. I've heard that after breaking in the...

My new motor has 500 miles on the new motor so its time for an oil change, I got a new filter..now what kind of oil should I put in it right now it has SAE-30 in it. what is my best bet for oil? p.s. Im about 5300 ft. above sea level...

I started my mustang for the first time today since I put a new motor. Its a 5.0 roller motor and its either brand new or factory refurbished I think. Cobra intake GT40 or GT40p heads (I think, could be E40 or something weird) HO cam Full exhaust, no cats, no EGR no smog pump, no A/C. 5-speed...

My car is in the shop getting 3.90 gears putt in as we speak. I was wondering is there a special way to break them in??:headscratch: and how many miles should i run it before i really put them to the test? Thanks

just got my new 8.8 axil in and i was wondering is there any sort of breaking in period i need to know about?