Skip the auto shop - Our mechanics make house calls

Q: Switched to synthetic high mileage (5w-30) for the first time and have noticed power loss and faint smoke coming out of tail pipe?

asked by on

Switched to synthetic high mileage (5w-30) for the first time and have noticed power loss and faint smoke coming out of tail pipe. What do you think this could be from? Engine is quieter and seems okay but ever since I switched my "get-up & go" has got up and went. Any help is appreciated

My car has 209000 miles.
My car has an automatic transmission.

A: Hi, thanks for writing in. The smoke coming...

Hi, thanks for writing in. The smoke coming from the tail pipe is not from the oil you are using. The fuel pressure and computer should be checked to see if there is a fuel pressure or computer problem. You may have a loose air filter housing between the MAF and the throttle body. If you would like further help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect this loss of power in the car for you, and make or suggest any repairs as needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Multiple windows not working

Hello. That is a common issue that many owners with your particular vehicle encounter. If all of the windows stopped working at once, it is likely due to a faulty switch or fuse. But if if they stopped working individually,...

Q: How to diagnose a fan clutch?

If the fan clutch is a thermostatic type then you should be able to start the vehicle cold and using a shop towel, dangle it in the fan blade while keeping your hands clear, to see if the towel stops...

Q: Radiator hose problem

Hi. It sounds like your thermostat is stuck closed and needs to be replaced. The thermostat is closed when you first start your engine in the morning, preventing circulation of coolant at first as the engine warms up. Once at...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...