Non-Automotive

[Shannow]

Originally Posted By: MinamiKotaro
Originally Posted By: slomo
Isn't a 0w30 a 0 grade oil?


0w30 is a 30 grade oil with a 0 winter rating. The two numbers have nothing to do with one another, and aren't even measured on the same scale.


Sort of both right in a way...

Here's a blending guide for Mobil oils...(not a Mobil 1 recipe)

the 0W30 has a base oil viscosity (@100C) of 5.13 (could be a 0W, 5W, or 10W really), and HTHS of 1.84, and through the addition of 7% Viscosity Modifiers and pour point depressents ends up with a Viscosity at 100C of 10.8, and an HTHS of 3.1. (note that the base oil viscosity is lower than the 0W20, and higher than the 0W40.

the 5W30 has a base oil viscosity of 6.78 (32% thicker than the 0W30, and above the minimum viscosity for 0W, 5W, 10W, 15W, and 20W), and an HTHS of 2.31. Through the addition of only 2.8% VII, and PPDs it gets a KV100 of 10.5 and an HTHS of 3.2...note that the base oil viscosity drops through 5W40 and 5W50...

 

[Oldmoparguy1]

Originally Posted By: Moondawg
Sorry, non-automotive question. My 4cycle weedwhacker calls for 30w HD oil. Would conventional PYB 10w30 hurt it?

This is amazing!! Not a single poster actually answered the op's question. The op has a 4 cycle WEEDWACKER!! I have no personal experience with such an ope. I would think that a quality 10w30 should be fine, but I can't know for sure.

Is there anyone here who actually has some hands on experience???

 

[Oldmoparguy1]

OK, on www.troybilt.com I found this answer to my question, "type of oil used in 4cycle weedwhacker?"

Quote:
Crankcase Oil - Hand Held 4-cycle Engine
Answer ID 386 | Published 01/21/2003 08:35 AM | Updated 02/18/2015 02:32 AM

What is the proper crankcase oil for a 4-cycle hand held engine?

The crankcase of four-cycle engines, used on hand held trimmers and blowers, should be filled with a
high quality SAE 30 weight oil of American Petroleum Institute (API ) service class SF, SG, SH, SI, SJ... or higher


Hope this helps,

Wayne