10-year Mazda 5 manual, when I start the car in the morning, the engine is very loud. But after driving, the noise reduces significantly. What's the reason for this?

I'm considering buying a 2011 Mazda 5 manual. For those who've driven the manual version, what's the engine RPM approximately at 120 km/h?

Is it normal for the 2008 imported Mazda 3 to have a cold start RPM of 1600, with a particularly loud noise that decreases after about a minute?

10-year Mazda 5 manual, when I start the car in the morning, the engine is very loud. But after driving, the noise reduces significantly. What's the reason for this?

Is it reasonable to spend 10,000 for a few paint touch-ups on a 2009 Mazda 2, 95,000 kilometers, manual, 1.5 hatchback?

Looking to buy a first-hand Mazda 5 in good condition, year not important.

Why does the car make a humming noise at 40 mph? The noise is very loud, and the shock absorbers have been replaced.

I'd like to ask Mazda 5 owners, why is the noise level so high in this car? How can it be resolved, and how do you deal with valve cover oil leakage? What are your Mazda 5's fuel consumption rates in the city and on the highway? My 2011 automatic Mazda 5 costs 0.9 RMB per kilometer in the city.

Is it normal for a manual 10-speed vehicle to feel very bumpy on slightly uneven roads?

What could be the cause of the Mazda 6 air conditioning compressor frequently cycling on and off and making loud noises?

Car enthusiasts, my 10-year-old 2.0 Mazda 6 has reached its mileage. Which one is better, Castrol Magnatec or Idemitsu IFG3?