Oils

[Skippydiesel]

Yes! I realise this topic may have been discussed to death already but recommendations seem to change over time so I thought why not give it another go.

I live in Australia - climate range can go from 0C (rarely) - 47C (also rare). Mowing range mostly 21- 40C (grass growing).

In my small engines - push mowers/pumps/generator/ compressor, older ride on (B & S 17 hp) I use a straight, single grade, mineral oil W30 - never had a problem.

Put a new Kawasaki 22hp in my commercial zero turn - Mower shop recommended I use a semi synthetic 10W-40 with Zinc. Kawasaki manual says I can use the 10W- 30 or 40 OR the straight W30 BUT advises that fuel consumption will go up with the multigrade oils.

I am happy to put a semi synthetic multigrade in my "Kwaka" IF there a real benefit, otherwise will use the W30.

What is your advice?

 

[GearHead36]

IMO, the engineers who designed the engine know more about what oil is best than any shop owner. Also, most engines that die from oil related problems do so because the oil never got changed. So the mfrs are probably recommending the best oil for their engines, but these engines are notoriously tolerant of neglect. At least, they used to be. Not sure about the newer ones. Just don't let rodents make nests blocking airflow around the engine. That will kill an engine quickly.

If I had an expensive commercial engine (and I do), I'd run what the manual recommended (and I do). It doesn't cost that much more than the cheap stuff.

 

[Skippydiesel]

Thanks GearHead,
As you probably know, the engine (Kawasaki FX651V) oil recommendations are pretty vague. I could use a straight, mineral, SAE 30W or a multigrade SAE 10W- (30)40. My local mower shop is recommending the multigrade, going one step further and suggesting it be a synthetic (most of which seem to come with Zinc). Cost while important, is not the issue her - its what is best for my engine.

 

[7394]

Wow, old chart. Kaw has 20-50 listed on new charts.

 

[Ozcub]

I am also located in Oz and use a premium quality 10w/40 oil it covers the diverse range of climate/temperature that I have to mow in
Been using that grade for over 20 years no problems yet !!!!!
Oz

 

[Skippydiesel]

Thanks for that Oz.

I have been operating/maintaining and repairing small engines for a bit over 50 years. I find it's often worthwhile reviewing my oil choices, as I am now.

SA 30W (Mono) straight mineral had been my go to oil for most of this time. Penrite has been the main supplier however times change and Penrite no longer have Mono as their recommended product. It's still available but many of my past suppliers have dropped it from their shelves.

Penrite are now recommending a semi synthetic 10W-30, API:SL. Followed by semi synthetic 10W-40, API:SL and a full synthetic 10W-50, API:SP.

I still have sufficient small engines to need about 10L (2X 5L) for my annual service. Best local deal was through Autobarn $65.99/5L advertised on their website - went there today. Staff informed me hadn't had stock for many months, due to change in stocking policy, have it in 2.5L for significantly higher cost/L.
Majorly pissed off (I hate false advertising), went across the road and purchased SCA mineral 15-40, API:SL for $37.99/5L.

 

[Ozcub]

What part of the Great South land are you located
Oz
(Southern Highlands area NSW)

 

[Skippydiesel]

Hi Oz,

Depending on your perspective just up (as in North) or down (as in lower elevation) than you.

The Oaks

 

[Ozcub]

Drive through there on a regular basis heading up to Windsor , many years ago knew old Fred Noakes when he had the shop at the southern end of town
Oz

 

[Skippydiesel]

Ha Ha!! Small World.

Yes! those in the know, use that shortcut - The Oaks to Penrith speed limits, are now down from 100 to 80 kph, as is the Penrith to Windsor road, which makes the route less attractive than before. Probably due to all the development in the area increasing the commuter traffic.