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Shock oil comparison

Shock oil comparison

Old 04-24-2008, 07:05 PM
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Default Shock oil comparison

Does anybody know of a website that compares the different brands of shock fluids as far as weights go? I just want to know how associated compares to Losi and such. I used to have a chart on my computer that did this but I cannot find it now. Any help would be appreciated. Thanks John
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Old 04-24-2008, 07:32 PM
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Old 04-24-2008, 07:45 PM
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For those of you just entering 1:8 scale racing. Just a little story about shock-fluids.

In the beginning of the 80's cars were equipped with small shock absorbers. The shock fluid used was normally a kind of transmission oil. These oils always changed in viscosity (thickness) during use and temperature. Therefore all kinds of products were tried. Even STP oil was used, you then had to warm up your shocks before racing with a hair dryer before you could use them. Fortunenatly silicone oil was introduced in the mid 80's. This type of oil has an better constant viscosity over a wider temperature range then other fluids but still is not stable. The thickness of the oil is officially rated in Centi Poise "Cps". An other known American rating is WEIGHT "WT". The thinner the oil (fluid) the lower the number, the ticker the oil the higher the number. For normal shock absorber use, this rate may vary between 100 Cs until 500 Cs. Nowadays we use O-ring sealed diffs, so we can use silicone oil in the diffs instead of thick grease. For diffs the rate may vary between 1.000 Cs (loose) up to even 500.000 Cs (very, very, stiff).

Some USA based companies are still using the "WT" weight rating, where Japanese and European companies use the better linear industry standard Centi Poise rating. A lot off people think that the ratings between the "WT" and "Cps" ratings are linear but this isn't the case. For shock absorber use, this is the comparison table when using LOSI, ASSOCIATED and SERPENT some others silicone oil rated in "WT" "W" or are not labeled with a rating but just a number like 30/300

un official conversion values provided by Gene Hickerson USA
Cps Associated WT Losi WT
100 10 7.5
150 15 12.5
200 20 17.5
250 25 22.5
300 27.5 25.0
350 30 27.5
400 32.5 30
425 35 32.5
450 37.5 35
500 40 37.5

The 50 Cps steps between "Cps" rating are linear, where the 5 WT steps used in the "WT" rating are progressive compared to the real thickness of the oil.
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Old 04-24-2008, 09:48 PM
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You can use this website:

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Old 01-01-2017, 06:21 PM
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I know this is old lol. W isn't Weight, it's Winter .
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