2-Stroke Engine Fuel-Oil Ratios: Difference between revisions

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**Impacts on Longevity, and [[Engine Deposits]] / [[Carbon Buildup]] (in particular on the [[Spark Arrestor]] / [[Muffler]] assembly
**Impacts on Longevity, and [[Engine Deposits]] / [[Carbon Buildup]] (in particular on the [[Spark Arrestor]] / [[Muffler]] assembly
*Digging into information on (Malicious) Regulatory Compliance, and if engines REALLY ARE just telling people to use 50:1 for emissions, rather than actual design changes, will also be covered  
*Digging into information on (Malicious) Regulatory Compliance, and if engines REALLY ARE just telling people to use 50:1 for emissions, rather than actual design changes, will also be covered  
=Common Ratios=
==50:1==
*50 Parts Fuel, 1 Part 2-Stroke Oil
==40:1==
*40 Parts Fuel, 1 Part 2-Stroke Oil
==Other Ratios==
*25:1
*32:1
*16:1
=Impact on Air/Fuel Ratio=
*Due to the [[Total Loss Lubrication]] ,  impacts in amount of Oil also directly impact the [[Air/Fuel Ratio]]
*Thus if one doesn’t want this to cause the engine to run more lean/rich, the Carburetor will need to be adjusted
*Some of the tests have neglected this, while comments have mentioned it
**Further SCIENTIFIC testing of this required, but decent Community Knowledge Backing


=Internal Links=
=Internal Links=
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=External Links=
=External Links=
*
*[https://youtu.be/9ywMl30_JPI?si=OWHXPVi8hBpgEg7- A Video by the YouTube Channel “Dave’s Small Engines” Titled “Will my chainsaw last longer if i use more oil?  Is it safer?  (25:1 VS 50:1 temperature testing] ( ‘’’~15 Minute Watch’’’ )
**Main downside is the only thing they did was measure Cylinder (outer) Wall, and Muffler Temperature, both with a [[Laser Thermometer]] .  The procedure was through + well thought out, but no investigation on [[Engine Deposits]] [[Carbon Deposits]],  or of Wear (On the Cylinder, on Valves, etc).  Cut tests were alright, but more [[Project Farm]] esque jigs, or a [[Dynamometer]] test would be nice for quantification of power etc
*[https://youtu.be/HPYMtmN3sgc?si=UaZsGBN22z91YdWI A Video by the YouTube Channel “kracer” Titled “How to select two-stroke oil” ] ( ‘’’~6 Minute Watch’’’ )
**Mentions Petroleum Based Oils, Castor Based Oils, and Fully Synthetic Ester Based Oils
*[https://youtu.be/rEyvbb70LwU?si=XqriT66N4DJGym7c A Video by the YouTube Channel “markotd44” Titled “Two Stroke Oil vs Castor Oil” ] ( ‘’’~3 Minute Watch’’’ )
**Rather informative/interesting demo, granted CITATION NEEDED somewhat (although that applies to these other videos too somewhat)


[[Category: Small Engines]]
[[Category: Small Engines]]

Latest revision as of 20:14, 18 December 2025

Basics

Common Ratios

50:1

  • 50 Parts Fuel, 1 Part 2-Stroke Oil

40:1

  • 40 Parts Fuel, 1 Part 2-Stroke Oil

Other Ratios

  • 25:1
  • 32:1
  • 16:1

Impact on Air/Fuel Ratio

  • Due to the Total Loss Lubrication , impacts in amount of Oil also directly impact the Air/Fuel Ratio
  • Thus if one doesn’t want this to cause the engine to run more lean/rich, the Carburetor will need to be adjusted
  • Some of the tests have neglected this, while comments have mentioned it
    • Further SCIENTIFIC testing of this required, but decent Community Knowledge Backing

Internal Links

External Links