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Discussion Starter · #1 · (Edited)
So, after owing car for 2 months and having 1350 miles on it, I decided to replace oil (I believe in engine break-in) and to install mud guards.

I was positively surprised to see that mud-guards for CX50 are made in Japan!!! Fit and finish is excellent!!! ( Mud-guards for our 2021 Lexus NX are made in Canada) It took me 20 minutes to install all 4. (How dealer could have asked $250 for installation simply blows my mind....)

Knowing that Mazda Turbo runs hotter than any turbo-charged car I have owned, I decided to get the best oil I could find. Amsoil Signature became my choice. CX50 comes with oil filter Made In Japan and the one I have installed was made in Mexico. BTW, Do you guys know where to get original Japanese oil filters stock?

After oil change I put 20 miles around the city but I cannot say I can sense ANY difference.I just hope the top tier oil will provide better protection on cold start ups.....
 

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I put Amsoil SS 5w-30 in my CX50 today. It has 1950 miles. You’re not going to see any difference. Honestly, as long as you do frequent oil changes, it doesn’t really matter what oil you run. As long as it’s synthetic. These are not high performance motors, turbo are not.
 

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Discussion Starter · #3 ·
I put Amsoil SS 5w-30 in my CX50 today. It has 1950 miles. You’re not going to see any difference. Honestly, as long as you do frequent oil changes, it doesn’t really matter what oil you run. As long as it’s synthetic. These are not high performance motors, turbo are not.
I bet you have some experience with Amsoil - what do you honestly think about it? Is it TRULY worth the extra investment or is it all in our heads?
CX50 is the first car I put Amsoil into and am considering converting my Lexus NX into it.
I have been Mobile One user for years. None of my cars are performance oriented that are pushed hard. Honestly, I would be surprised if anything above 3000RPM was ever reached on any.
Also, should I keep the 5000miles intervals or should I push it to 6-7k considering that this is Signature blend?
What do you think?
 

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I bet you have some experience with Amsoil - what do you honestly think about it? Is it TRULY worth the extra investment or is it all in our heads?
CX50 is the first car I put Amsoil into and am considering converting my Lexus NX into it.
I have been Mobile One user for years. None of my cars are performance oriented that are pushed hard. Honestly, I would be surprised if anything above 3000RPM was ever reached on any.
Also, should I keep the 5000miles intervals or should I push it to 6-7k considering that this is Signature blend?
What do you think?
I’ve been using Amsoil’s signature series for over ten years now. Most of my cars have been performance cars that have been either slightly or heavily modified. I wanted the extra protection and my oil analysis always came back good. I really don’t see the point of running Amsoil’s SS in our motors. I think you are fine saving a little money and changing the oil with Mobile 1 or another high quality tier 3 synthetic every six months or 5000 miles. Which ever comes first.
 

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Discussion Starter · #5 ·
I’ve been using Amsoil’s signature series for over ten years now. Most of my cars have been performance cars that have been either slightly or heavily modified. I wanted the extra protection and my oil analysis always came back good. I really don’t see the point of running Amsoil’s SS in our motors. I think you are fine saving a little money and changing the oil with Mobile 1 or another high quality tier 3 synthetic every six months or 5000 miles. Which ever comes first.
Do you trust the oil analysis? Also, is it really needed for normal cars that are used as commuters? I have always had that impression that oil analysis is reserved for performance/racing units. What do you think about Royal Purple? Some say it is hit or miss with recent batches...

As you probably seen in my other posts, I have some problems with CX50's built quality. To me it is simply not acceptable to have these kind of issues in $44k car. As of last week, I am on a waiting list for 2023 Lexus NX350 F-Sport. I put refundable deposit so if will not fall in love in my Mazda by then, it will be gone :)
Good news is - I have probably 5-6 months to make up my mind.
So there is some time to experiment with oil and over all experience.
 

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Do you trust the oil analysis? Also, is it really needed for normal cars that are used as commuters? I have always had that impression that oil analysis is reserved for performance/racing units. What do you think about Royal Purple? Some say it is hit or miss with recent batches...

As you probably seen in my other posts, I have some problems with CX50's built quality. To me it is simply not acceptable to have these kind of issues in $44k car. As of last week, I am on a waiting list for 2023 Lexus NX350 F-Sport. I put refundable deposit so if will not fall in love in my Mazda by then, it will be gone :)
Good news is - I have probably 5-6 months to make up my mind.
So there is some time to experiment with oil and over all experience.
Unless you want to run extended oil change intervals, I don’t see the need to do an oil analysis on our cars. I am doing one because I have a strong gas odor in my oil and I’m concerned it may have a leaking fuel injector. We’ll see how much fuel is in the oil when I get the report back.
Royal Purple is an average performing tier 3 oil that charges tier 4 price. There is better oil for less money.
I, too have had some quality issues with my Cx50. Not in materials, but craftsmanship. They already say not to buy a first year vehicle, but I have done this in the past with Mazda with no issues. I would say it comes down to training in the factory, but I think it comes down to work ethic more than training. If it remains reliable for me, I’ll keep it for a little while. We shall see!
 

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Discussion Starter · #7 ·
Unless you want to run extended oil change intervals, I don’t see the need to do an oil analysis on our cars. I am doing one because I have a strong gas odor in my oil and I’m concerned it may have a leaking fuel injector. We’ll see how much fuel is in the oil when I get the report back.
Royal Purple is an average performing tier 3 oil that charges tier 4 price. There is better oil for less money.
I, too have had some quality issues with my Cx50. Not in materials, but craftsmanship. They already say not to buy a first year vehicle, but I have done this in the past with Mazda with no issues. I would say it comes down to training in the factory, but I think it comes down to work ethic more than training. If it remains reliable for me, I’ll keep it for a little while. We shall see!
Yes, the problem lies in poor "Takumi" rather than material. I will still say that 12 speakers Bose system outperforms anything from Lexus (Used to own 5 Lexus vehicles in the past). Also, the driving dynamics are much more engaging with CX50 than with NX. Correct again - we will loose on ethic's level anytime. I really wish CX50 were made in Japan.
So far, I am trying the best I can to like Mazda....it has its good sides.
 

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Yes, the problem lies in poor "Takumi" rather than material. I will still say that 12 speakers Bose system outperforms anything from Lexus (Used to own 5 Lexus vehicles in the past). Also, the driving dynamics are much more engaging with CX50 than with NX. Correct again - we will loose on ethic's level anytime. I really wish CX50 were made in Japan.
So far, I am trying the best I can to like Mazda....it has its good sides.
It definitely has it good sides. Although outdated, the powertrain is pretty good and the chassis is decent. All the problems I have had with the trim pieces, with the exception of one item (rear bumper out of alignment), I have been able to fix on my own. I hope it proves to be reliable, because I don’t want to deal with the car market right now, and that is saying a lot for me. I’ve owned 65 cars in the past 25 years. I like to trade up often!
 

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Do you trust the oil analysis? Also, is it really needed for normal cars that are used as commuters? I have always had that impression that oil analysis is reserved for performance/racing units. What do you think about Royal Purple? Some say it is hit or miss with recent batches...

As you probably seen in my other posts, I have some problems with CX50's built quality. To me it is simply not acceptable to have these kind of issues in $44k car. As of last week, I am on a waiting list for 2023 Lexus NX350 F-Sport. I put refundable deposit so if will not fall in love in my Mazda by then, it will be gone :)
Good news is - I have probably 5-6 months to make up my mind.
So there is some time to experiment with oil and over all experience.
I've run Royal Purple, Amsoil, Mobil one in different cars over the past 20 years...and Amsoil definitely outperforms the other two. I've run each for over 15,000 miles and both Mobil and Royal Purple had noticeable loss/burn off/consumption. Amsoil I've run for over 25,000 miles with less than half the consumption in comparison. To me, without question Amsoil is the superior oil.
 

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So, after owing car for 2 months and having 1350 miles on it, I decided to replace oil (I believe in engine break-in) and to install mud guards.

I was positively surprised to see that mud-guards for CX50 are made in Japan!!! Fit and finish is excellent!!! ( Mud-guards for our 2021 Lexus NX are made in Canada) It took me 20 minutes to install all 4. (How dealer could have asked $250 for installation simply blows my mind....)

Knowing that Mazda Turbo runs hotter than any turbo-charged car I have owned, I decided to get the best oil I could find. Amsoil Signature became my choice. CX50 comes with oil filter Made In Japan and the one I have installed was made in Mexico. BTW, Do you guys know where to get original Japanese oil filters stock?

After oil change I put 20 miles around the city but I cannot say I can sense ANY difference.I just hope the top tier oil will provide better protection on cold start ups.....
The turbos run hotter which is why they run 5w20 over 0w20. The oil dilution would allow for too much consumption or varnishing. I would suggest buying filters from the dealerships as they'll have the proper filtering requirements and flow rates.
 
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