Chart to estimate oil consumption.
Function f(x) = 9.61307 * 1.0959 ^ MPG
There is simpler chart that I have devised with rounded numbers to make it easier to remember. I explained it well in the link below which is essentially a guide and not something written in stone.
There are two keys to this guide. The first is the chart that respects the chance in oil demand at different rpm and load. The second is the simple method to calculate a percentage less or more oil using the mpq (Miles Per Quart of oil). So if you prefer 20% less oil, then it is a simple % calculation based on mpq which respects the need for oil at different rpm and load. I firmly believe this is a leap forward.
The hidden advantage is if a tech or the owner makes a change to the oil consumption either purposely or inadvertently, then this change becomes easy to calculate. The same holds if an engine is rebuilt or a change in track or clutching, or anything that affects the fuel consumption. As long as you know the Fuel vs Oil consumption before the change, then you have the ability to compare the before and after.
I keep thinking that I need to submit this to BRP. I know they have their own chart which is essentially what I was able to extract. But the ease in calculating the % increase or decrease may be something new.
Oil vs Fuel consumption (see pages 17 and 18)
Simpler chart
4 mpg @ 14:1 @ 14 mpq
5 mpg @ 15:1 @ 19 mpq
6 mpg @ 17:1 @ 25 mpq
7 mpg @ 18:1 @ 32 mpq
8 mpg @ 20:1 @ 40 mpq
9 mpg @ 22:1 @ 49 mpq
10 mpg @ 24:1 @ 60 mpq
11 mpg @ 26:1 @ 70 mpq
12 mpg @ 29:1 @ 85 mpq
13 mpg @ 32:1 @ 105 mpq
14 mpg @ 35:1 @ 120 mpq
15 mpg @ 38:1 @ 140 mpq
16 mpg @ 42:1 @ 170 mpq
17 mpg @ 46:1 @ 195 mpq
18 mpg @ 50:1 @ 225 mpq
19 mpg @ 55:1 @ 260 mpq
20 mpg @ 60:1 @ 300 mpq
Edited by Daag44, 18 January 2021 - 03:08 PM.
