Could this be true

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5
Location
ca
I was talking to one of the technicians at a mazda dealer the other day, and he told me that mazda does not recommend Synthtic Oil on their turbo vehicles. He told me that it is because fumes from Synthetic oil causes oxygen sensors to make engine run leaner. I personally do not think it makes sense at all, but I am not an expert. What do you guys think?
 
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1,084
Location
Florida, USA
Synthetic oil can do harm to their rotary engine and will void the warranty, so they probably tell everyone who owns a Mazda not to use synthetic just to make sure the message is not confusing.
 

hibuhibu

Thread starter
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5
Location
ca
I always knew that they do not recommend syntetic for their rotary engines, but I thought that it was not the case for turbo engines.
 
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5,681
Location
North Texas
 Originally Posted By: Drew99GT
I think that mechanic has been sniffing too many fumes from a can of spray paint.
Or sniffing fumes from the cars running synthetic oil.
 
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2,537
Location
Rochester, MI, US, World
 Originally Posted By: hibuhibu
I was talking to one of the technicians at a mazda dealer the other day, and he told me that mazda does not recommend Synthtic Oil on their turbo vehicles. He told me that it is because fumes from Synthetic oil causes oxygen sensors to make engine run leaner. I personally do not think it makes sense at all, but I am not an expert. What do you guys think?
your car shouldn't burn that much oil to affect the sensors in the first place... i call [censored].
 
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11,154
Location
Florida, Cape Coral
I have an email from the Mazda technical engineering rep. Any oil meeting viscosity and service requirement grade is acceptable including synthetic and synthetic blend. I hate these self appointed experts passing out false information. I had to take a copy of the email to my dealer and had a sit-down with their head service person. After reviewing the email from Mazda he said ALL service personnel & technicians would be informed that if the car owner requested a synthetic oil that is what he gets. My car is a Mazda CX 7 turbo.
 
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Messages
820
Location
Tennessee, USA
 Originally Posted By: Max_Wander
wow! the original [bee ess] rumour from the 80s has really evolved into something dumb.
Who used synthetic in the 80's? I used it once in 1988.
 
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1,365
Location
orwellian sheep land?
 Originally Posted By: Hethaerto
 Originally Posted By: Max_Wander
wow! the original [bee ess] rumour from the 80s has really evolved into something dumb.
Who used synthetic in the 80's? I used it once in 1988.
Maybe that rumour is from the 90's? It just seems so old and misinsterpreted at this point, even for the Rotary engine.
 
Messages
820
Location
Tennessee, USA
 Originally Posted By: Max_Wander
 Originally Posted By: Hethaerto
 Originally Posted By: Max_Wander
wow! the original [bee ess] rumour from the 80s has really evolved into something dumb.
Who used synthetic in the 80's? I used it once in 1988.
Maybe that rumour is from the 90's? It just seems so old and misinsterpreted at this point, even for the Rotary engine.
You're not getting off that easy, mister.
 
Messages
907
Location
Canada
Off Topic I used Shell Artic Oil in about 1978, semi syn oil,5-30 oil too,still in the old tin quarts, bright yellow quart with red lettering, loud label. I remember everyone telling me to get that oil out of my Datsun once the temps raised above -10F or my engine would burn up due to that thin oil. I remember guys buying Mobil 1 for $6.00 quart in 1978, black and silver lable on tin quart if I remember right. $6.00 for a quart oil in 1979 was serious coin back then. Cyprs
 
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549
Location
New Mexico, U.S.A.
 Originally Posted By: BigNick
A bit off topic.. but how/why does synth harm a rotary engine?
Simplified, but essentially true: a properly functioning rotary engine burns a good bit of oil, period. Conventional oil burns more completely and cleanly, while synthetic (more resistant to high temps) can leave deposits on the engines' apex seals. So syn is a no-go in that application.
 
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19,479
Location
Chicago Area
tropic - I thought the cat was what would ultimately suffer from the oil use. Either way, synth oil seems 2nd best at this time in rotary engine development.
 
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Messages
6,156
Location
Buffalo, NY
 Originally Posted By: hibuhibu
I was talking to one of the technicians at a mazda dealer the other day, and he told me that mazda does not recommend Synthtic Oil on their turbo vehicles. He told me that it is because fumes from Synthetic oil causes oxygen sensors to make engine run leaner. I personally do not think it makes sense at all, but I am not an expert. What do you guys think?
No. The Mazda dealership my friend used to work at was happy to use Mobil1 (in a non-rotary engine)...
 
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Messages
5,471
Location
Da Swamp
 Originally Posted By: Cyprs
Off Topic . . . I remember guys buying Mobil 1 for $6.00 quart in 1978, black and silver lable on tin quart if I remember right. $6.00 for a quart oil in 1979 was serious coin back then. Cyprs
It's serious coin now.
 
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