EPR 2PK Opti 34oz Bottle 2 Cycle Engine Oil Mix Opti-2 Enviro Formula 20112

What It Is

This is a pre-measured 2-cycle engine oil mix (34 oz bottle) designed for air-cooled, high-revving small engines like those in string trimmers, leaf blowers, chainsaws, and hedge trimmers. The Opti-2 Enviro Formula is a synthetic blend that reduces smoke and carbon buildup.

Fitment & Compatibility

• Engine type: For 2-cycle engines only – not for 4-stroke mowers or any engine with a separate oil sump.
• Fuel mix ratio: Opti-2 is a 50:1 mix (2.6 oz per gallon). Do not use with pre-mix bottles that require 40:1 or 32:1 ratios unless you re-calculate.
• Brand/model: Works with any brand (Stihl, Husqvarna, Echo, Ryobi, etc.) that specifies a 50:1 mix. Check your equipment manual for the required ratio – if it calls for anything else, this oil won’t be correct.
• Volume: One 34 oz bottle treats 13 gallons of fuel. Verify that’s enough for your season’s use; bulk buyers may need multiple bottles.
• OEM vs aftermarket: This is an aftermarket oil, not OEM for any brand. It meets API TC and JASO FD specs, so it’s a direct replacement for most factory oils.

Key Things to Know

• Pre-mixed: Shake well, then add the entire bottle to 13 gallons of fresh, ethanol-free gasoline (if available). Do not add extra oil.
• Installation difficulty: Trivial – just pour into a gas can and stir. No tools needed.
• Quality: Synthetic blend reduces spark plug fouling and exhaust smoke compared to conventional 2-stroke oils. Users report less carbon on piston rings.
• Gotcha: If you have a small tank (e.g., a trimmer that holds 1 pint), you’ll need to store the mixed gas or use a smaller pre-measured bottle. This 34 oz bottle is best for bulk mixing.

Should You Buy It

Buy this if you own multiple 2-cycle tools (trimmer, blower, saw) and want a single, low-smoke oil that simplifies mixing and reduces engine deposits. It’s a good value for heavy users who go through several gallons of mixed fuel per season, but not ideal for occasional use with a single small tool – you’ll waste mixed gas.