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How much does the 2021 Lexus IS cost? With just two trim levels but three carryover powertrains, the price spread on the 2021 Lexus IS is pretty small.
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- Robert Duffer
- Senior Editor
Feb 3, 2022 · In my previous car before the Challenger, owner's manual states the car is designed to take regular unleaded fuel with an octane rating of 87 but manufacturers recommend putting 91. So I put 91. Very clear.
Oct 1, 2020 · Time to go 100 per cent propeller-head: Octane rating is an index of the knock resistance of a particular fuel compared to a laboratory standard kind of fuel called iso-octane. Which is actually 2,2,4 tri-methyl pentane - for those of you who remained awake for carbon chemistry in high school.
An octane number beyond 100 can only be obtained by an extrapolated octane rating curve or utilizing octane enhancers such as tetra-ethyl lead with the iso-octane reference fuel [14].
Apr 29, 2024 · Gasoline with a higher octane rating is more resistant to knocking, providing a smoother and more controlled burn in the engine. Gasoline in Canada typically comes in four main octane ratings: 87 (Regular), 89 (Mid-Grade), 91 (Premium) and 94 (Super Premium).
Sep 7, 2015 · For example, let's say you decide to run race fuel: how much octane does your car need? Do you buy leaded or unleaded race fuel? Should you buy oxygenated race fuel or not?
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