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: Constantly overheating 2003 Dodge Durango

It seems like you have an air flow issue or air in the system. The fan clutch should spin with a small amount of resistance when the engine is cold. With the engine up to temperature, the fan clutch should...

Q: Why are my wipers going off when I turn the turn signals on?

Hi, thanks for writing in. It appears that there may be an issue within the column. The controls for the wipers and turn signals are separate units, but are connected by a series of wiring within the column, and there...

Q: 06 dts 110k new plugs and packs started idle shuttle hesitant at first then stops bought car used i believe fuel filter is origina

Hello, thanks for writing in about your Cadillac DTS. The fuel filter and fuel pump may be the cause of this issue. You should have the fuel pressure tested first to see if the fuel pump is failing. Replace the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...