The 2003 Cadillac Escalade is recommended to use premium grade unleaded fuel with a MINImum of 91 octane rating as stated by the factory specs. The reason for the higher recommendation is because the engine needs the higher detonation resistance and higher air compression from the fuel. This will make Your motor run smoothly without any problems. If You use lower quality gas it can cause timing issues with the pistons which will cause a decrease in performance and fuel economy. You can also develop a ticking sound in the engine because of lower fuel quality. The gas is important to keep the recommended octane rating as You will maximize the life of Your fuel system and will keep it running efficiently.
DJ bree'
September 17, 2020
I have use 87 with no problems I always use an octane booster with the 87 octane & no problems. Truck still going after 4 years of having it now.
Brandan Bieber
March 11, 2020
I have used 87 and i have never had a problem even with 385k on it
Donna J.
August 29, 2019
The Escalade is designed to use 91 octane gasoline. While 87 octane fuel can be used, this is not recommended, as it could cause engine knock and engine destruction over time.
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