Can anyone tell me if there is an alternative for diesel please?

Yes there is. Just type on Google Stabil 360 Diesel and you shall be showered with options where to buy them. Good luck

Is this the best fuel stabiliser for a 2-stroke 2.5hp mercury outboard?

I have 115hp Yamaha outboard. I dont think this is a stabiliser as such. I use it as a fuel enhancer and add to fuel for normal use. I use the Sta-bil Storage liquid when I leave the boat which can be for four or five months. Had problems before I used it but now engine starts however long its left. I'd recommend both and use them as appropriate.

Is this safe to mix with lead substitute additive already being used in the fuel tank of the car?

I will say so as this is only a fuel stabiliser and water moisture repellent. This is mainly used on boats giving the higher humidity content.

Is 1oz to 10gals in american gallons

Hi David, I am a regular user of this product. The dosage instructions state 1oz to 10 US gallons or 30ml to 38 litres. There are "oz" and "ml" markers on the bottle neck so it is very easy to measure and use. You don't have to be exact if you have an unknown quantity in a tank. This product works very well and is used in my collection of classic cars and bikes as they are run in rotation. I have not experienced any fuel related problems since using this.

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Description

🛥️ Keep your marine engine flawless—because your ride deserves the best fuel care!

MASSIVE COVERAGE - One 250 ml bottle treats up to 80 gallons of petrol—max efficiency, minimal effort.
MOISTURE WATER BARRIER - Advanced formula actively prevents corrosion caused by moisture and water attraction.
ULTIMATE ETHANOL DEFENSE - More than double the corrosion protection to safeguard your marine engine year-round.
POWERFUL FUEL SYSTEM CLEANER - Over 4x the cleaning strength of regular stabilizers for peak in-season performance.
MARINE GRADE PERFORMANCE BOOST - Specifically engineered for boats, jet skis, and water sport engines to keep you ahead on the waves.

STA-BIL360 Marine Ethanol Treatment and Fuel Stabilizer is a premium 250 ml formula designed to treat up to 80 gallons of petrol. It delivers over four times the fuel system cleaning power and twice the corrosion prevention compared to regular stabilizers, specifically engineered to protect marine engines from ethanol-related damage and moisture-induced corrosion, ensuring superior in-season performance for boats, jet skis, and other watercraft.

Specifications

Capacity	80 gallons
Fuel type	Petrol
UPC	073905222396 182682942097
Manufacturer	Sta-Bil
Global Trade Identification Number	00073905222396, 30073905223097
Model	770-176
Product Dimensions	18.67 x 9.65 x 4.19 cm; 244.94 g
Item model number	22239
Exterior	Smooth
Manufacturer part number	770-176
OEM Part Number	22239
Special Features	Advanced formula for engines used in water environments, to better remove the moisture, America’s #1 Ethanol Treatment, Helps prevent Ethanol fuel related damage in vehicles and small engines, Helps prevent corrosion damage and helps remove water, Use in your boat, jet ski, or any water sport engines to clean the fuel system and improve performance
Voltage	12 Volts
Item Weight	245 g

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