Using 87 Octane in 1990 LS400
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Pole Position
Joined: Jul 2006
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From: Tis the season for cheesin
Using 87 Octane in 1990 LS400
I know that for the LS400's it says PREMIUM unleaded fuel only.. but what happens if you just use 87 octane? does it lessen the engine life or what?
Lexus Champion
Joined: Aug 2007
Posts: 3,298
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From: CA
is this like the #1 discussed topic now because the gas price is high now?
read here, the verdict: don't do it
https://www.clublexus.com/forums/sho...d.php?t=354962
read here, the verdict: don't do it
https://www.clublexus.com/forums/sho...d.php?t=354962
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Joined: Dec 2003
Posts: 533
Likes: 7
From: California
Actually, premium, relative to the cost of regular unleaded, has never been cheaper. Since most gas stations still have a 10 cent spread between grades, percentage wise premium is only 2.5% more expensive than regular. It used to be 5 to 6 % more expensive than regular.
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