amirza786
Senior Member
- First Name
- A
- Joined
- Oct 4, 2018
- Threads
- 87
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- 3,854
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- 3,947
- Location
- Northern California
- Vehicle(s)
- 2022 Polestar 2, 2010 Lexus IS 350 Sport
- Thread starter
- #31
We are currently on winter blend here in California. Our state mandates the different blends....Winter and Summer gas blends also have an effect on the performance too.
Summer blend has close to 2% more energy than winter blend.
On winter MPGs should be normally worse due to the combination of different factors like the gas blend and weather.
Colder Air requires more fuel to keep the air fuel ratio on check. Remember that cold air has generally more oxygen so if the ecu don't add more fuel the car will run leaner than normal. To overcome this the ECU adds more fuel to the mix.
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