The experimental results show a clear distinction
between the oils where the avocado, olive, canola, and peanut oils all have the lowest
COF values (between 0.02 and 0.10), while sesame, vegetable, corn, and safflower oils
all have the highest COF values (between 0.30 to 0.50). Figure 4.1(b) shows the variation
of the COF for various natural oils at the completion of the test. Here, it is clearly
illustrated that avocado oil has the lowest COF value of the natural oils tested.
PG 131The trends shown in Fig. 4.4(b) are in agreement with Fig. 4.3(b), where
avocado oil demonstrates the lowest wear rate and corn and vegetable oil demonstrate the
highest wear rate at both ambient and high temperature testing conditions.
Through a chemical
composition analysis, tribological analysis, and thermogravimetric analysis, the influence
of fatty acid content in natural oils revealed the following conclusions:
Avocado oil was shown to have the best tribological properties with the lowest
friction and wear at ambient and high temperature conditions.
godlameroso wrote: ↑25 Jan 2021, 13:37Neat avocado oil outperformed a synthetic group 5 motor oil in terms of wear protection and COF by a decent margin
Synthetic Avocado oil incoming?JordanMugen wrote: ↑25 Jan 2021, 16:31godlameroso wrote: ↑25 Jan 2021, 13:37Neat avocado oil outperformed a synthetic group 5 motor oil in terms of wear protection and COF by a decent margin
Incredible stuff. Avocados are a rather expensive fruit, wouldn't avocado oil be rather expensive for an industrial product?
Very. It's $7 US for 250ml, or $28 per liter. Or $150 for enough to do an average oil change. Maybe you get a bulk discount but then you need to spend more for your additive package.JordanMugen wrote: ↑25 Jan 2021, 16:31godlameroso wrote: ↑25 Jan 2021, 13:37Neat avocado oil outperformed a synthetic group 5 motor oil in terms of wear protection and COF by a decent margin
Incredible stuff. Avocados are a rather expensive fruit, wouldn't avocado oil be rather expensive for an industrial product?
Castor bean oil has certainly proven itself to be so, & for over a century...godlameroso wrote: ↑25 Jan 2021, 03:38That stuff handles heat like no other. Would be a great base stock.
The 'varnish' had to be wiped off with methylated spirit or the small galleries became blocked, also the return pipe into the top of the oil tank grew a 'stalactite'.Tommy Cookers wrote: ↑26 Jan 2021, 13:11castor oil ie Castrol R was mandatory for the (4 stroke) BSA 500cc Gold Star road motorcycle made until 1963
(though not ? for the similar Velocette 'Thruxton' that took over the same road/race niche until 1970)
both were 'old-style' aircooled designs having rolling-element bearings and corresponding (low-flow ?) lubrication design
castor oil's USP was outstanding attraction/retention by metal that might amount to outstanding film strength (if needed)
yes R oxidised rapidly in use and coated the engine internally with 'varnish'
yes the exhaust had a unique smell when the engine was hot