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・Fair and transparent pricing

Get a quote

What others are asking

Q: Transmission over temperature and truck doesn't start.

I have seen this concern with your Jeep Commander before, not only through my own personal experiences, but also from other certified mechanics working on this vehicle. Through some tag team diagnostic skills, we were able to determine that one...

Q: I have a 2000 dodge dokota 3.9l v 6 with 4 SPD auto my check engine light came on an the codes reads cyl misfire po300 po301po305

Hello and thanks for writing in. These codes relate to misfires as you know, which can be caused by many different reasons beyond spark plugs and wires. Engine misfires can be caused by many different problems and are generally caused...

Q: Finding a rear axle leak on a 2000 Dodge

Normally it is either the gasket that is leaking at the back or the seal is leaking on the front pinion shaft where the drive shaft goes in and spins around. If you really want to find out what it...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...