jrk1956

1998 LS 400, 220K miles.
What do you all think about 0W40 synthetic Castrol? Will it harm or confuse the VVT?
Walmart is now selling this weight oil. Also they have a small selection of Toyota OE oil filters.

Thanks,
Jim

Stroock639

why is 0W-40 even being considered? 5W-30 is all it specifies, 10W-30 if you're in a consistently warmer area

also you're gonna want the 90915-YZZD3 filter

Sin1UZFE

I go 10w30 in summer and 5w30 in winter doesnt seem to be eating any oil for me. 238k

aptoslexus

Just use the factory recommended oil weight. End of story.

YODAONE

Is your engine consuming oil?
Otherwise, 0W-40 may be a bit too thick at operating temperature..

Do Not Use 10W-30 oil. 1970's oil tech

Should you feel the need to proceed with factory recommended 5W-30 oil, then use synthetic.

The contemporary solution is 0W-30 synthetic oil, which was not available in the '90s.
Excellent cold start characteristics.

Although used in contemporary Lexus' Do Not Use 0W-20 oil.....
-20W lacks necessary shear strength at operating temperature.

To better understand what the first and second set of numbers signify,

See:

https://www.clublexus.com/forums/mai...motor-oil.html

spuds

WINNER!

YODAONE

Advances in engine oils render owners manual recommendations of twenty to thirty years ago obsolete.

The purpose of the link was to provide reasoned information for educated decision towards selection of best engine oil.

OP: the link outlines why 0W-30 (produced in synthetic only) is a better solution than 5W-30....and why 10W-30 is not ideal in any climate.

Any reason you are considering 0W-40?

jrk1956

Thank you for the advice, guys. I will go with the 5W30 synthetic.
Was only considering 0W40 for quicker oil flow at start-up.
Jim

YODAONE

If you want better cold start, why not go with 0W-30 synthetic???

Take a moment to read the information contained in the link.