Honda GX270 Engine

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Aug 30, 2004
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I recently purchased a pressure washer that is equipped with a Honda GX270 engine. The manual is silent on the recommended oil type, but the package included a 32 oz pouch of 10W-30.

Would a small engine benefit from a high-zinc oil such as Valvoline VR1?
 
I don't really think so. The high ZDDP oils are for the camshaft, and the small engines have such light spring pressures that it is not necessary. I have been running my rider with a Tecumseh engine for nearly 50 years with just any cheap 30 oil, and the last 4 or 5 years 10w30 or whatever, and it still runs fine.
 
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The GX270 manual from honda is fairly specific as in as long as you use oil that is SJ or better
 
If it’s anything like my 160. I use what ever 5 or 10W30. Currently M1 HM 5W30 and left over Amsoil SS 5W30. Before that T5 10W30. I did use Amsoil Small engine for 4 years. 13 years old now and runs great.
 
My mower has run 17 years on 10W-30(ish), about 30hr/yr.
Started off with 10W-30. Then collected all the half-quarts and poured them together into a M1 5 qt jug. It's a mix of conventional 10W-30 and M1 10W-30. Then, whenever I do an oil change on the cars/motorcycles (0W-20, 5W-30, 5W-20, 10W-40, etc), I turn the empty bottles over and drain all the drips into a container. This drip oil goes in the mower first and I top it up with the 10W-30 brew. Works great. Mower does not use any oil and it drains clean when I do an oil change every year or two. Also, I don't have a bunch of half-empty oil bottles laying around!
 
I believe there is no catalytic convertor, unless they changed, so you are free to use a HDEO. I use Rotella T5 10W30. It’s well proven that Bitoggers pay way too attention to small engine oil than it is worth. ;)
 
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