Preferred Synthetic Oil Choice?
03-30-17, 04:35 PM
#46
Lexus Test Driver
0W-30 and 5W-30 has the same viscosity at normal full operating temperature of 100°C (212°F). The last number is the viscosity at 100°C. For example, 0W-30, 5W-30 10W-30 all have the same viscosity at normal operating temperature.
The first number (0W, 5W, 10W, etc.) is the viscosity at the cold temperature specified. A 0W oil will provide quicker lubrication to bearings on cold starts (compared to 5W, 10W, etc.), which is when an engine's bearings are most likely to be damaged due to dry metal-on-metal contact due to [cold start] oil starvation.
Car makers moved to 20 weight viscosity engine oil for better fuel mileage. Some adjusted the bear clearances a bit, some didn't. The 20 weight viscosity engine oil provides more than ample lubrication for a long engine life. The move to 0W engine oils do more to prolong engine life because it reduces wear where the wear is most prevalent - cold starts.
The first number (0W, 5W, 10W, etc.) is the viscosity at the cold temperature specified. A 0W oil will provide quicker lubrication to bearings on cold starts (compared to 5W, 10W, etc.), which is when an engine's bearings are most likely to be damaged due to dry metal-on-metal contact due to [cold start] oil starvation.
Car makers moved to 20 weight viscosity engine oil for better fuel mileage. Some adjusted the bear clearances a bit, some didn't. The 20 weight viscosity engine oil provides more than ample lubrication for a long engine life. The move to 0W engine oils do more to prolong engine life because it reduces wear where the wear is most prevalent - cold starts.
What I stated is fact...and has nothing to do with the climate in which you operate your vehicle.
Last edited by bclexus; 03-30-17 at 05:07 PM.
04-02-17, 12:56 PM
#48
I bet your buddies Lambo is every 15k or one year which ever is first. Lamborghini knows it takes the majority of their owners 4 years before their car will see 15k on the odometer. When I had my Aston Martin DB9 the oil change interval was 1 year or 10k miles which ever was first. I remember their was a guy in the club who thought their was no tie limit. It took him almost 6 years to put 15 miles on his car but by that time the oil was muddy and sludgy and he lost the lower end. Aston Martin wanted 75k for a new engine. I'm the believer that oil is the life blood of the engine and changing it often is cheap insurance for longevity. Personally we change our oil every 7k miles or 1 year which ever is first in our GS350. I use Mobil, Valvoline, or Castrol... it really depends on what happens to be on sale at that time.
04-02-17, 01:23 PM
#49
Lexus Test Driver
It's very clear you don't have a clue what you're talking about.
The second number after the 'W' indicates the oil’s SAE viscosity measured at 212° F (100° C). It is always measured at this temperature...
The 'operating temperature' of an engine is typically 200° to 212°F (100°C), regardless of what the ambient temperature may be.
The second number after the 'W' indicates the oil’s SAE viscosity measured at 212° F (100° C). It is always measured at this temperature...
The 'operating temperature' of an engine is typically 200° to 212°F (100°C), regardless of what the ambient temperature may be.
04-03-17, 01:37 PM
#50
Driver School Candidate
so I got my GS350 about a month ago at 34k miles. It hit 35k miles and the maintenance light came on... I figured it's just based on the mileage and doesn't need an oil change. After getting to 35,700 miles it's started giving me a warning saying I need an oil change. The car was a pre owned from a Toyota dealer and was a previous lease vehicle which should have been fully maintained by the Lexus dealer. Based on what I read for the maintenance schedule, I shouldn't need an actual oil change until 40K miles, right? Or should I just take it in to Lexus and have them do it?
04-03-17, 02:10 PM
#51
so I got my GS350 about a month ago at 34k miles. It hit 35k miles and the maintenance light came on... I figured it's just based on the mileage and doesn't need an oil change. After getting to 35,700 miles it's started giving me a warning saying I need an oil change. The car was a pre owned from a Toyota dealer and was a previous lease vehicle which should have been fully maintained by the Lexus dealer. Based on what I read for the maintenance schedule, I shouldn't need an actual oil change until 40K miles, right? Or should I just take it in to Lexus and have them do it?
Did you check the maintenance app on the infotainment system? It will tell you what is due. The maintenance light should come on every 5k miles if defaults are still programmed.
04-04-17, 09:10 AM
#52
Driver School Candidate
No I didn't know there was a maintenance app in the infotainment system.. Will check it. But when the car turns on it now shows the previous dealership it used to be serviced at and shows that it needs an oil / filter change - wasn't sure before if it's accurate or just a generic maintenance thing.. Guess I have my answer now :-)
04-04-17, 10:47 AM
#53
Lexus Test Driver
You should Register your car on the Lexus Owners Site which will give you the [Lexus] maintenance history of your car.
Also, as you have learned - you should configure the Maintenance App to your liking. I think most people do not use the Maintenance App, but instead us the simple instrument cluster maintenance reminder feature that alerts you every 5k miles.
Also, as you have learned - you should configure the Maintenance App to your liking. I think most people do not use the Maintenance App, but instead us the simple instrument cluster maintenance reminder feature that alerts you every 5k miles.
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itjustme (04-07-17)
04-05-17, 05:47 PM
#55
Lexus Test Driver
08-14-17, 03:58 PM
#58
Lexus Test Driver
If synthetic engine oil was used in an engine that ran at a constant 2,000 RPM that engine oil would probably test out to still be perfectly reliable for engine protection after 100,000 miles, but of course that's not the norm. It is required that the engine oil and filter be changed at least once a year, regardless of minimal mileage. The reason for the once-a-year requirement is because engine oil can become contaminated with fuel, combustion by-products and moisture over-time...especially so if the vehicle is driven short distances and not given the chance to get up to normal operating temperature, especially during cooler months.
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mopudding (08-14-17)
08-15-17, 09:41 AM
#59
I am a Royal Purple *****.....My 2017 GS is getting fed Royal Purple HPS 5w20 after the free oil change at 10,000 miles(currently at 6500 miles).....yes I know Toyota recommends 0w20 but Royal Purple HPS doesn't come in 0w20.
