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Thread: Octane for 450
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07-25-2019, 09:11 PM #1Senior Member
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Octane for 450
Owners manual says minimum octane for the 450 is 91. What if you are boating in the middle of nowhere and the only available fuel is 89?
What is your method for dealing with this?
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07-25-2019, 09:24 PM #2
Straight out of Indmar Manual
Unless you are at high elevation I would not run 89 unless you had 50% 93 in the tank.
Sent from my iPhone using Tapatalk2021 Supra SA 400
2018 Supra SA 400 (SOLD)
Michigan
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07-25-2019, 09:40 PM #3Senior Member
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Hence the reason for me asking.
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07-25-2019, 09:44 PM #4
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07-25-2019, 09:56 PM #5Senior Member
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No man. The boat is going to live out in the middle of the state where they don’t have regular access to premium gas.
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07-25-2019, 10:02 PM #6
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07-25-2019, 10:08 PM #7Senior Member
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1600’
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07-25-2019, 11:08 PM #8Senior Member
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After a little research it is looking like Lucas oil octane boost might be a good way to go in a very cost-effective manner.
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07-26-2019, 07:08 AM #9
Octane for 450
There are formulas out there where you can buy toluene and Xylene from paint supply stores in bulk and make your own octane booster.
I also know you can use MTBE.
Just be very diligent in understanding the amount of octane you get from boosters.
Each point is 0.1 octane. You need a minimum of 30 points of octane to make 89 into 91.
You could also mix in unleaded race gas like VP C10. Order it in 5 gallon cans. It’s 100 octane.
Sent from my iPhone using TapatalkLast edited by larry_arizona; 07-26-2019 at 07:17 AM.
2021 Supra SA 400
2018 Supra SA 400 (SOLD)
Michigan
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07-26-2019, 07:42 AM #10
Octane for 450
EDIT: you need 20 points or 2 numbers to make 89 into 91. However, I would error on the side of caution and go 30 points. Even at 91 you are leaving a little power on the table. Ideally you want 93.
Lucas Oil 10026-PK12 Octane Booster - 15 oz (Pack of 12) https://www.amazon.com/dp/B001OZL9OQ..._drUoDbGBYRZDD
Your Makai holds 60 gallons, looks like you would need 36oz of Lucas octane booster or 2.4 bottles.
Another option:
http://www.klotzlube.com/techsheets/KL-602.pdf
1oz per gallon gives you 25 points or 2.5 octane boost. 60 oz per fill up
Bonus on the klotz is it’s also a fuel stabilizer.
Sent from my iPhone using TapatalkLast edited by larry_arizona; 07-26-2019 at 07:54 AM.
2021 Supra SA 400
2018 Supra SA 400 (SOLD)
Michigan