Q: I fill up my gas tank and I put unleaded plus when it is required to put unleaded regular and I always put that on the highway I n

asked by on

I fill up my gas tank and I put unleaded plus when it is required to put unleaded regular and I always put that on the highway I noticed the temperature was going up and down not drastically but it was making movement and on a complete stop it shaked

My car has 63000 miles.
My car has an automatic transmission.

Hi Patricia. Thanks for contacting us today. While running the recommended fuel to your car is important, it’s less likely that the swap to a higher octane has created this temperature issue. It’s most likely that there is a different mechanical problem - such as an obstruction of debris in the cooling lines, or a faulty coolant temperature sensor or radiator thermostat. It’s also possible that a fuel system component is clogged with excessive carbon deposits or needs to be serviced. I think the best thing to do have a professional mechanic complete an on-site inspection to determine what is causing this problem - so that any repairs or service can be completed before damage occurs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I fill up my gas tank and I put unleaded plus when it is required to put unleaded regular and I always put that on the highway I n

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: Cadillac heater issue 2005 Cadillac DeVille

Hi there - I suspect your cabin heating scenario is a problem with the air blend doors in the heater unit itself. The lack of heater function typically has 5 causes: the engine is not getting up to correct temperature...

Q: Car put in park, started reversing, gear shifter stuck - 2014 Cadillac ATS

Hi! There may be a misadjustment between the shift lever and the transmission that caused this issue. A fault with shifter operation could also be to blame. The failure to restart may actually be due to the safety switch that...

Q: Q: Engine Locked

Hello, thank you for writing in. When the engine is locked up, it means that it is stuck in place for one reason or another, and it will not rotate like it normally does. This is directly related to the...

Related articles

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.