Synergy gas really good for your car1/1/2024 ![]() And it’s further influenced by the car you run, how you drive it and the type of driving you do. You could spend a lifetime searching internet forums for the answer to this and never come to a reliable conclusion. Esso doesn’t make any claims about its Synergy Supreme+ diesel. That would increase a 40mpg car to just 40.72mpg. With diesel, regular costs on average 176.6PPL and premium 188.4PPL, a difference of £5.31 per 45-litre fill.Īssuming the car does 40mpg on the regular fuel, for the premium diesel to pay for itself, it would have to improve fuel consumption to 44.6mpg.Īnyone who's played around at increasing their car's economy by changing their driving style will know this is a significant margin.Īccording to Esso, its Synergy diesels boost mpg by 1.8%. If you fill up with 45 litres, regular petrol will work out £5.76 cheaper every fill. How Do You Know if Your Car Needs Premium Petrol?Īs of April 2022, the RAC reported that the average price of regular unleaded petrol is 162.5 pence per litre (PPL) and the average price for premium unleaded is 175.3PPL. ![]() If the air filter is dirty, less air can get into the engine under hard acceleration, meaning your car speeds up more slowly. Where it will make a difference however, is performance. Nowadays however, air flow sensors and computer software carefully manages the air/fuel mix in your car’s engine, ensuring maximum fuel economy is possible regardless of the quality of air. ![]() Much like warming up your car, dirty air filters did used to impact gas mileage, especially in older, dirtier carbureted engines. Nowadays, it isn’t needed, thanks to clever systems designed to get cars up to operating temperature as quickly as possible after you start it, and oils that cling to the cylinder to protect it even when the engine is cold. That was in the days before advanced synthetic oils, fuel injection and electronically-controlled engines, where cold-engine wear was a major issue of premature engine failure. If you’re of a certain age, you’ll remember the days when you had to go outside and start your car before driving it to get the engine up to temperature before you asked too much of it. Warming up the engine before driving is good Keeping the windows open on the other hand, affected gas mileage so little that it was impossible to measure. Using the air conditioning to keep the car cool impacted gas mileage by a shocking 3mpg. Under lab conditions, it tested a Honda Accord along a test track at 65 mph. ![]() It’s a common misconception that winding down windows on your car to provide ventilation creates so much extra drag that your gas mileage falls further than it would if you use the on-board air conditioning. In our experience, only a handful of everyday cars are tuned to run better on premium. In the real world, it barely affects performance, or fuel economy.Ĭonsumer Reports advises that premium should only really be used in your car if your owner’s manual mandates it. On a track, the extra boost given by premium can mean a few tenths of a second difference on a lap time. With today’s modern fuel-injection systems however, that shouldn’t make much difference.īecause premium gas has a higher octane rating than midgrade or regular gas, it produces a little more power when burnt.ĭesigned for performance cars with large, powerful engines, premium also helps minimize the risk of preignition inside highly-stressed, hot engine cylinders. The only difference? Cheaper gasoline sometimes omits the additives designed to clean older engines. In reality, all gas stations are tied by tight laws governing the storage and pumping of gasoline, while independent and no-name gas stations usually buy gasoline from the well-known oil companies anyway. We’ve even heard rumors in the past that say some gas stations dilute cheap gas with small amounts of water, affecting power and engine efficiency.īoth, Consumer Reports says, are not true. ![]() Read them, and let us know what you think.įor years, there’s been a common belief among drivers that gas purchased at independent gas stations isn’t the same quality as gas purchased from name-brand gas stations. Here are just seven of the mpg myths busted by the folks over at Consumer Reports. Some, it has proven, including preferring air conditioning over open windows and choosing tires with low rolling resistance, don’t affect your gas mileage as much as you’d think. ![]()
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