oil vs oil vs oil
07-08-13, 09:12 PM
#1
Intermediate
Thread Starter
oil vs oil vs oil
so i went for an oil change the other day to Esso (read mobil) and the mechanic tells me that since my car is almost 10 years old (2004 rx300) i should be putting 5w-50. From all i've read the furthest i've seen is lexmex goin on mobil 0-40 and saying its amazing so i did the 0-40 fully synthetic.
has anyone tried mobil fully synthetic 10w-50?
I had 10w-30 by valvoline i believe from the preivous mechanic and it was horrible semi-syn that went black at 5000km. i used to use the Shell helix ultra 5w-40 and it was a dream until my 50% off coupons ran out.
has anyone tried mobil fully synthetic 10w-50?
I had 10w-30 by valvoline i believe from the preivous mechanic and it was horrible semi-syn that went black at 5000km. i used to use the Shell helix ultra 5w-40 and it was a dream until my 50% off coupons ran out.
07-08-13, 10:43 PM
#2
No, no, no, no, no...
Do not listen to this person giving you bad advice. There is no need for you to use a heavier weight motor oil. Your RX should be using 5W30. Using a synthetic is a good thing but even that is not necessary to obtain a trouble-free high mileage engine. Beyond that one change there is no reason for you to switch to a heavier weight motor oil and definitely not a 50W oil. Tolerances in that engine of yours are still tight and I assume you are not blowing smoke out the tailpipe. If you are happy using a 0W40 synthetic there is probably little I can say to convince you to switch back. What you have access to there in your area is different than the oils we see here in the States -- different formulations.
FWIW, I have vehicles that are over 40 years old and even they do not need 50W motor oil. They get 10W40 Mobil 1 and have been very happy with that over the years and these are engines which can be tough on motor oil.
While you have the RX body of a 2nd Generation, your engine there in HK is the prior generation 3.0L. So, you might be better off posting this type of question in that section of the forums here at CL and checking with Lexmex with his experience with the same engine in his RX300.
Do not listen to this person giving you bad advice. There is no need for you to use a heavier weight motor oil. Your RX should be using 5W30. Using a synthetic is a good thing but even that is not necessary to obtain a trouble-free high mileage engine. Beyond that one change there is no reason for you to switch to a heavier weight motor oil and definitely not a 50W oil. Tolerances in that engine of yours are still tight and I assume you are not blowing smoke out the tailpipe. If you are happy using a 0W40 synthetic there is probably little I can say to convince you to switch back. What you have access to there in your area is different than the oils we see here in the States -- different formulations.
FWIW, I have vehicles that are over 40 years old and even they do not need 50W motor oil. They get 10W40 Mobil 1 and have been very happy with that over the years and these are engines which can be tough on motor oil.
While you have the RX body of a 2nd Generation, your engine there in HK is the prior generation 3.0L. So, you might be better off posting this type of question in that section of the forums here at CL and checking with Lexmex with his experience with the same engine in his RX300.
07-09-13, 08:14 AM
#3
Lexus Champion
No, no, no, no, no...
Do not listen to this person giving you bad advice. There is no need for you to use a heavier weight motor oil. Your RX should be using 5W30. Using a synthetic is a good thing but even that is not necessary to obtain a trouble-free high mileage engine. Beyond that one change there is no reason for you to switch to a heavier weight motor oil and definitely not a 50W oil. Tolerances in that engine of yours are still tight and I assume you are not blowing smoke out the tailpipe. If you are happy using a 0W40 synthetic there is probably little I can say to convince you to switch back. What you have access to there in your area is different than the oils we see here in the States -- different formulations.
FWIW, I have vehicles that are over 40 years old and even they do not need 50W motor oil. They get 10W40 Mobil 1 and have been very happy with that over the years and these are engines which can be tough on motor oil.
While you have the RX body of a 2nd Generation, your engine there in HK is the prior generation 3.0L. So, you might be better off posting this type of question in that section of the forums here at CL and checking with Lexmex with his experience with the same engine in his RX300.
Do not listen to this person giving you bad advice. There is no need for you to use a heavier weight motor oil. Your RX should be using 5W30. Using a synthetic is a good thing but even that is not necessary to obtain a trouble-free high mileage engine. Beyond that one change there is no reason for you to switch to a heavier weight motor oil and definitely not a 50W oil. Tolerances in that engine of yours are still tight and I assume you are not blowing smoke out the tailpipe. If you are happy using a 0W40 synthetic there is probably little I can say to convince you to switch back. What you have access to there in your area is different than the oils we see here in the States -- different formulations.
FWIW, I have vehicles that are over 40 years old and even they do not need 50W motor oil. They get 10W40 Mobil 1 and have been very happy with that over the years and these are engines which can be tough on motor oil.
While you have the RX body of a 2nd Generation, your engine there in HK is the prior generation 3.0L. So, you might be better off posting this type of question in that section of the forums here at CL and checking with Lexmex with his experience with the same engine in his RX300.
Good advice^^^^^^ I would use 5W-30 Synthetic (doesnt matter which brand) Also re: the Valvoline getting dirty after 5,000K miles, the oil was just doing it`s job keeping the motor clean.
07-09-13, 08:45 AM
#4
You wonder where some folks get this mumbo jumbo. Read your manual and it states what oil to use. And there is no qualification for mileage. 5W-30 is it.
BTW, where are you located?
BTW, where are you located?
07-09-13, 09:12 AM
#5
Super Moderator
You are right about what I said about the 0W40.
The RX330 is a slightly different puppy with its engine than the one found in the RX300. My RX300 loves to chew oil and that's why I like the Castrol 0W30 which is more similar to a W40 oil.
I have tried a Mobil 1 5W50 and a 15W50 in Mexico and that's way too high from actual experience, but I also never felt comfortable with the Mobil 1 5W30 after they went away from trisynthetic and used to use additives until I could get my hands on better synthetics (it was a bigger difficulty than you can imagine even in Mexico City and more expensive on at that). However, there 0W40 and even W20 oils are far superior IMHO.
W40 would be the highest I would run. The RX330 has better oil passages than the RX300.
The RX330 is a slightly different puppy with its engine than the one found in the RX300. My RX300 loves to chew oil and that's why I like the Castrol 0W30 which is more similar to a W40 oil.
I have tried a Mobil 1 5W50 and a 15W50 in Mexico and that's way too high from actual experience, but I also never felt comfortable with the Mobil 1 5W30 after they went away from trisynthetic and used to use additives until I could get my hands on better synthetics (it was a bigger difficulty than you can imagine even in Mexico City and more expensive on at that). However, there 0W40 and even W20 oils are far superior IMHO.
W40 would be the highest I would run. The RX330 has better oil passages than the RX300.
07-09-13, 11:05 AM
#6
RuninRoach, you either need to update your profile to state where you are located or you need to let others know such when you post questions about your particular vehicle. Not everyone, actually very few, are aware the 2004 RX300 even exists outside of the US and its configuration.
In some markets Lexus sold a 2004 RX300 which is our 2nd Generation body with the previous generation 3.0L engine and is not a typo. Yes, that 3.0L is tougher on oil and has been known to suffer from oiling problems as Lexmex has stated.
Finally for RuninRoach, you may find Bob is the Oil Guy (BITOG) to be a quality source for information on oil products for your region. As stated previously, you have access to product formulations we do not see here in the US. While we can comment in general about a product here in the States, it would be unwise to assume the same would hold true for a similarly looking bottle you find on your shelves there in HK.
07-09-13, 11:55 AM
#7
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