I have a 2024 LX600 Fsport with 13k miles and from my research I am learning the Toyota WS is complete s*** fluid. This transmission is so erratic and rough I think its worth changing the fluid. Now I need to figure out how I do that,, very easily right.
Figured my OCD research may help some others out (but I really should get back to work now
). Feel free to critique or comment as I can edit misinformation, if any. I haven’t done the fluid change yet either, just ordered it.
$31 qt. Lube Guard Complete Full Synthetic- 6.1 cSt @100°C
$13.50 qt. Royal Purple Max ATF 01320- 6.0 cSt @100°C (per email they answered). Full Synthetic.
$7.34 qt. Aisin ATF0WS- 5.7 or 5.9 cSt @100C (rockauto vs Aisin website). Full Synthetic.
$13.50 qt. Valvoline Max Life- 5.9 cSt @100C. Full Synthetic.
$13 qt. Toyota WS- 5.4 or 5.5 cSt @100C (conflicting information online). Not a synthetic.
$12.32 qt. Idemitsu TLS-LV- 5.3 cSt @100C. Don’t know if this is synthetic but gets decent reviews.
Honorable mention (stuff I bought):
Lubegard 19610 Dr. Tranny Instant Shudder Fixx 2 Ounce 2 Pack.
Lubegard 63010 Platinum Automatic Transmission Fluid Protectant, 10 oz. (Probably should have got 15oz as it should take 12oz for 12qts.)
I bought the Royal Purple fluid. I wanted the highest viscosity but didnt want to spend $30 qt for the Lubegard.
I may also take it to Lexus and complain and make them put Aisin in it (owned by Toyota, Toyota’s transmission company). Then put those additives in.
People online have good luck with the Valvoline Max Life as the best value because it can be bought on sale and/or bulk price.
Check compatibility for yourself. I am sure the Royal Purple works and believe the others do, but Valvoline MaxLife may not advertise as WS compatible. Use all at your own risk.
Figured my OCD research may help some others out (but I really should get back to work now

$31 qt. Lube Guard Complete Full Synthetic- 6.1 cSt @100°C
$13.50 qt. Royal Purple Max ATF 01320- 6.0 cSt @100°C (per email they answered). Full Synthetic.
$7.34 qt. Aisin ATF0WS- 5.7 or 5.9 cSt @100C (rockauto vs Aisin website). Full Synthetic.
$13.50 qt. Valvoline Max Life- 5.9 cSt @100C. Full Synthetic.
$13 qt. Toyota WS- 5.4 or 5.5 cSt @100C (conflicting information online). Not a synthetic.
$12.32 qt. Idemitsu TLS-LV- 5.3 cSt @100C. Don’t know if this is synthetic but gets decent reviews.
Honorable mention (stuff I bought):
Lubegard 19610 Dr. Tranny Instant Shudder Fixx 2 Ounce 2 Pack.
Lubegard 63010 Platinum Automatic Transmission Fluid Protectant, 10 oz. (Probably should have got 15oz as it should take 12oz for 12qts.)
I bought the Royal Purple fluid. I wanted the highest viscosity but didnt want to spend $30 qt for the Lubegard.
I may also take it to Lexus and complain and make them put Aisin in it (owned by Toyota, Toyota’s transmission company). Then put those additives in.
People online have good luck with the Valvoline Max Life as the best value because it can be bought on sale and/or bulk price.
Check compatibility for yourself. I am sure the Royal Purple works and believe the others do, but Valvoline MaxLife may not advertise as WS compatible. Use all at your own risk.
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