Wrong oil / dealer knowledge?

[BaransuIS250]

As mentioned in another post after my service in March my car always felt slightly different. Driving it again last night after a while it just seems a little sluggish and not quite as smooth. I was wondering if perhaps the dealer put the oil in for the IS300H and this would make a difference? Or are the oils the same in both? The dealer has probably never worked on my model before as I think only about 10 were probably ever registered!!  (slight exaggeration maybe). On my first 2017 service the same dealer wrote on the report under the spare wheel section 'N/A - Hybrid' which really didn't give me confidence in their work. Clearly they didn't even look and don't know about the 200T.  

[Zotto]

The prescribed oil for IS300h is 0W-20, if someone uses different oils  it could result in slight worsening of mpg and engine different noise, provided to have a good quality synthetic oil.

[BaransuIS250]

4 minutes ago, Zotto said:

The prescribed oil for IS300h is 0W-20, if someone uses different oils  it could result in slight worsening of mpg and engine different noise, provided to have a good quality synthetic oil.

Thanks, do you know what is prescribed for the 200T? The noise of the engine does also seem rougher when cold.

[Zotto]

Sorry I don't know, may be a 5W-30 API SM or later, for sure you can read the right oil on car manual.

[rayaans]

11 hours ago, BaransuIS250 said:

Thanks, do you know what is prescribed for the 200T? The noise of the engine does also seem rougher when cold.

Oil type is the same as the IS300H according to US manuals. 

https://www.google.co.uk/url?sa=t&source=web&rct=j&url=https://www.lexus.com/pdf/service/MY16-Lexus-IS200t-Warranty-and-Services-Guide.pdf&ved=2ahUKEwi804rCku3bAhUkIsAKHYBSDcwQFjACegQIAhAB&usg=AOvVaw1eX9s_v9UQok8JcXQfjQWl

However, Lexus used 5w30 in Europe and 0w20 in the states for the IS250 so maybe it's 5w30 for the IS200t here too. However, seriously doubt a small change in oil grade would make a huge difference.

[J Henderson]

0w20 was also used in the IS250 after 2010. I'd imagine the 200t is the same grade.

[TBi]

Sorry to resurrect an old thread but i just got my lexus IS300h serviced and they put 5w30 in it. I just noticed they did the same at the last service. Can this do any damage? Should i get them to put the proper stuff in?

[NemesisUK]

I doubt it will have any significant effect.

"What is oil viscosity and what impact does this have?

Viscosity is a measure of the resistance of a fluid’s flow. The thicker (high viscosity) of an oil, the slower it will flow.

Most oils on the shelves today are "Multigrades", which simply means that the oil falls into two viscosity grades (i.e. 10W-40 etc). In a 10W-40 for example the 10W bit (W = winter) simply means that the oil must have a certain maximum viscosity or flow at low temperature. The lower the "W" number the better the oil's cold temperature performance.

The 40 in a 10W-40 simply means that the oil must fall within certain viscosity limits at 100°C. This is a fixed limit and all oils that end in 40 must achieve these limits. Once again the lower the number, the thinner the oil: for example, a 30 oil is thinner than a 40 oil at 100°C."

https://www.mobil1.co.uk/learning-centre/car-care/engine-oil-faq.aspx?p=2

Read here for a full explanation

https://www.opieoils.co.uk/t-car-motorbike-engine-oil-grades-viscosity-explained.aspx