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Mend Ryobi Petrol Strimmer

Petrol/oil mix?

I have an older ryobi petrol strimmer, but have no idea of the petrol/oil mix for a two stroke engine, or indeed what type of oil to use. Can you help? Thanks.

patrick dulieu
June 2008
What is the mixture for Ryobi RSV 3100E Leaf Blower

Allan Methven
August 2012
I run all my 2-stroke equipment at 50:1, using a good 2-stroke oil, obtainable anywhere that sells garden equipment, or at most motor factors (for use in 2-stroke motorcycles).

A lot of people on here have advised more oil in the mix than this - with modern oils there simply isn't any point. Ratios up to 16:1 have been advised - these applied when the only oil available was the same oil that went in your car.

Example - I have a 25 year old McCulloch chainsaw. For the first 10 years of it's life it ran on 25:1 mix (as per instructions) using good quality oil (Castrol GTX). It ran fine, but smokey, and ate spark plugs at the rate of about 1 per 10 hours use. For the last 15 years, it has had 50:1 on low-ash 2-stroke oil. It now goes like stink, and has enough power to cut through anything. As a bonus, it's almost smoke free, and has used 3 plugs in 15 years. This saw does serious work, it's not a twice-a-year tool!

phil_saunders@bigfoot.com

Phil Saunders
June 2008

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