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How many miles should i wait after adding a bottle of fuel system cleaner to install a new e the fuel fitler?

Should i add fuel system cleaner before or after changing fuel filter?

I bought a 1994 infiniti j30 with 106k miles and have no idea if the previous owner used synthetic or regular oil so i was thinking to use a high mileage synthetic blend? what do you guys think? Also can high mileage oils cause leaks from swelling the seals up if your car is not leaking?

I wanted to know if you can tell me what are the production dates for these oils and how to read them?

My car has pennzoil synthetic blend oil 5w20 in it now but i noticed its burning oil and i need to add some so i was thinking to top it off with pennzoil high mileage synthetic blend 5w20 oil since it has some conditioners and sealers that might help. Will this be ok to do? 2002 ford mustang gt...

I got a check engine light on cold start for code p1151 after 5 minutes of it running. I do have a catless exhaust system no o2 sensors so can this be why im getting the code? Thing is I never got a cel on before and i been driving the car for the past couple of days with a catless exhaust...

My car calls for 5W20 but i figured its ok to use 5W30? Its summer here so i thought it would benefit using the 30 instead of 20. Its a 2001 Ford Taurus 3.0 v6 with 127K miles and i put the Castrol High Mileage Syn Blend 5W30 in it. what do you guys think is better to use?

The Hengst air filter at the top has way more paper than the Audi brand air filter on the bottom so wouldn't less paper equal to better air flow? I have a 2006 Audi A8 4.2l

I was wondering is it normal for battery volts to drop when temps are 10F and below? I checked my car battery the next day while it was dead cold without it running and the windchill temp was -3F it read 12.15 volts is this normal considering the temperature was below zero or is that low? I...

So the last time the previous owner changed the oil on my car was at 122,418 miles fully synthetic and now the car has 129,400 but the thing is he changed it back in March of 2019 and it should be done every 10k miles according to the owner's manual but its almost been a year so should it still...

Hey guys i just bought a 2006 Audi A8 4.2 with 129k miles and im wondering would 5w40 fully synthetic oil be ok to use? The previous owner used 0w40 but i got Castrol EDGE 5W-40 Advanced Full Synthetic Motor Oil with a Audi oem oil filter. I live in Chicago and temps now are between 20s-40s. I...

I just bought a 2002 Saturn lw200 2.2l with 62k miles and the spark plugs and cabin filter were last changed at 59,304 miles but that was back in March 2016 so im wondering should i replace the plugs and filter or im still good? It was a old lady who drove the car and seems like she didnt drive...

I was cleaning my interior today in my car with the car off and i didnt realize i turned the heater knob to speed 1 then after i got done cleaning my car i went to start it and 8min later noticed the heater was on is this ok? Does it cause any problems to have the heat on when right when u start...

My car is making noise from the exhaust and noticed the flex pipe broke off a bit from where it was welded is it ok to drive like this? Will it cause damage to anything if i dont get it replaced asap?

I just bought this car and i have no idea what type of gas the previous owner used in it but it takes premium and i always fill at shell but i couldn't find a shell station close by so i filled up with bp premium but now its getting low on gas and i wanna fill up with shell vpower is it ok to...

I noticed ever since i put chevron techron fuel system cleaner in the near empty tank and filled up with shell premium 93 gas the car dont cold start as fast as it use to.Is it possible the previous owner was using regular gas and now the car is confused? Also i went from 5w30 oil to 10w30...

I have a 1998 jaguar xj8 and the previous owner put 5w30 but i think that's too thin considering it has 102k miles and its a v8. What do you guys think? I used mobil super 5000 10w30 by the way and temps range from 40 to 70f at the moment but summer is right around the corner.

So i went to the mechanic today to see if he can figure out what this noise is. When i turn my lights on you hear it very little like hardly but then with my lights on foot on the break and i put it in drive or reverse its louder like squeaky. He tested the alternator and battery and said those...

I pulled out the plugs on my 1994 infiniti j30 3.0 v6 and they were Bosch platinum+2 4301 but the manual calls for NGK double platinum 2647 so isnt this bad they put the wrong plugs in the car? Also do you guys know if the bosch 4301 plugs can be even used in my car? I went on there website and...

Hey guys i wanna do a custom exhaust on my infiniti j30 which basically has the same motor as a 300zx n/a the vg30de v6 but i was wondering should i go with 2.25 or 2.5 piping? I dont have any other mods on the car and dont really plan on adding anymore i just want to put a exhaust system on it...