lawn cut and hot oil change

[peter lena 8,644]

today , morning lawn cut and towing aeration , lawn came out sweet , cut on highest setting , never cut the same way twice , always mix it up , blades recently sharpened, dropped the oil right after cutting , tractor on slight angle of shed ramp , to enhance drainage , rotella 30 wt , and 4 ounces of  rislone  zinc additive. the oil that was drained , looked like black coal oil, the added cleaning and lubricity effects of zinc , has made me a believer in it , touched up any lubrication area as needed . trans oil clean , just a regular service / lookover  for anything . topped up fuel , added STA - BIL as with everything i have . rotating my 3 horses , they are always in the use and service stage. making virtually all areas common with change and improvement , keeps things simple ,and very reliable . will be dropping my decks for a look , and a hot oil soak down in the sun . no rust or buildup , just staying after it . pete 

[Pollack Pete 2,273]

Looks like you know all the secrets of long life for Wheel Horse tractors.Good job.........

[Jeff-C175 7,202]

2 hours ago, peter lena said:

4 ounces of  rislone  zinc additive

 

That's an awful lot Peter.  Too much Zn is not a good thing.  Too much Zn can cause the oil to become acidic.

 

Consider the following post from a thread in which you had participated.  

 

 

Just my opinion, take it or leave it!  

 

Edited August 13, 2021 by Jeff-C175

[peter lena 8,644]

@Jeff-C175, that's the bottle spec , for 2 qts , use a measuring cup to verify it , have  a number of hrs on that in all my small engines . just my own experience , but the operational running ease , tells you it's doing exactly what its saposed to do , read it yourself,  https://www.amazon.com/Rislone-4405-Supplement-Concentrate-Treatment/dp/B0075559UY/ref=asc_df_B0075559UY/?tag=hyprod-20&linkCode=df0&hvadid=312198323731&hvpos=&hvnetw=g&hvrand=13947847536420520577&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9003310&hvtargid=pla-567498281214&psc=1, actually , that's a little light , but my results have been very good , pete 

[Jeff-C175 7,202]

23 minutes ago, peter lena said:

bottle spec

 

Quote

OTHER APPLICATIONS For 4-stroke marine & motorcycles, agricultural, industrial and racing applications use 65 mL for every quart of capacity.

 

65ml is a tiny bit over 2oz.

 

Rislone's spec is based on SN grade oils which are federally mandated to not be above 800 ppm Zn.

 

Rotella T1 is above that, at nearly 1000 ppm.

 

I went to Rislone's website, read the data sheet on their ZDDP product, researched the Zn content of Rotella and SN oils and

determined that 1 or maybe at most 1.5 oz of ZDDP per quart of Rotella T1 would get one to the optimum level of Zn without becoming acidic over time.

 

What's the oil capacity of your engines? 

 

My KT17 holds about 1.5 QTS. 

65ml / QT means about  100ml (a little over 3 oz) for 1.5 QTS of oil. 

This is for oil that is STARTING at 800ppm of ZN (SN oils)

Since T1 is STARTING at nearly 1000ppm, one would use less ZDDP than they would for SN oil.

This works out to 1 oz / QT in Rotella T1.

 

When it comes to some things, more is not better.  Too much Zn causes the engine oil to become acidic and that would be worse than NO Zn at all!

 

Do the math yourself if you disagree, and decide if you are perhaps going a bit heavy on the ZDDP.  Completely up to you...  but as Cy Simms used to say, "An informed consumer...) etc

 

Edited August 13, 2021 by Jeff-C175

[tom2p 2,394]

agree - too much zinc not good

 

and in extreme cases although rare could lead to increased wear