oil question....once and for all
04-22-07, 03:16 PM
#1
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oil question....once and for all
ok ive been hearing here and there,never use synthetic in a rotory? then i here of people using it? so can u guys set this straight for me please? better? worse?
04-22-07, 08:02 PM
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yea i didnt think about that....i think all im gonna get is a handful of opinions,but ive been hearing that synthetic messes up rotory engines? well ill be happy to know different opinions,then ill get an idea on whats what! thanks for pointing that out doc!
04-23-07, 08:52 AM
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IMHO...seeing as how the recommended interval for these cars is 2500-3000 miles anyway, you lose the advantages of extended intervals gained by using a synthetic. Makes oil changes quite expensive. Use a high quality dino oil (Castrol GTX seems to be quite popular among RX7 enthusiasts) and 10W-30 during cold weather or 20W-50 during hot.
If you insist on using a synthetic, then use a high quality full synthetic. Royal Purple is an excellent choice. There is no harm in using a good synthetic in rotary engines.
If you insist on using a synthetic, then use a high quality full synthetic. Royal Purple is an excellent choice. There is no harm in using a good synthetic in rotary engines.
04-23-07, 08:59 AM
#7
..
Originally Posted by Mahjik
Straight from the Racing Beat Rotary Performance Technical Manual:
"The Mazda factory does not recommend the use of synthetic oils in their rotary engines - specifically addressing this issue in the Owner's Manual.
In 1979, Racing Beat began testing synthetic lubrication products. Without a doubt, the best synthetic oils do perform well in extreme heat (over 300 F) and extreme cold (below 32 F), but by the nature of Mazda's rotary engine, the oil temperature never exceeds 250 F without severe engine damage due to other factors. In Souther California, we have difficulty seeing the low-temperature benefits: however, when we put synthetic lubricants in the engine, transmission, and differential in our IMSA GTU race car, we immediately saw what we later found to be a common result: The oil temperature in all three locations dropped 5 to 10 F for the same operating conditions. This is apparently due to two factors: reduced friction between sliding surfaces, and reduced foaming. As we continued to use synthetic oil products it became clear that they genuinely reduced wear. We also found benefits in street use. On two occassions, cars with "scratchy" transmissions synchronizers were completely cured by a change to synthetic gear lube. After many years of experience with these products we have observed only one problem: because of the reduced friction, the time necessary to break in an engine, transmission, or limted slip differential (standard differentials are no problem) is excessively long, so we recommend using mineral oil in all three for a time to ensure rapid break in."
"The Mazda factory does not recommend the use of synthetic oils in their rotary engines - specifically addressing this issue in the Owner's Manual.
In 1979, Racing Beat began testing synthetic lubrication products. Without a doubt, the best synthetic oils do perform well in extreme heat (over 300 F) and extreme cold (below 32 F), but by the nature of Mazda's rotary engine, the oil temperature never exceeds 250 F without severe engine damage due to other factors. In Souther California, we have difficulty seeing the low-temperature benefits: however, when we put synthetic lubricants in the engine, transmission, and differential in our IMSA GTU race car, we immediately saw what we later found to be a common result: The oil temperature in all three locations dropped 5 to 10 F for the same operating conditions. This is apparently due to two factors: reduced friction between sliding surfaces, and reduced foaming. As we continued to use synthetic oil products it became clear that they genuinely reduced wear. We also found benefits in street use. On two occassions, cars with "scratchy" transmissions synchronizers were completely cured by a change to synthetic gear lube. After many years of experience with these products we have observed only one problem: because of the reduced friction, the time necessary to break in an engine, transmission, or limted slip differential (standard differentials are no problem) is excessively long, so we recommend using mineral oil in all three for a time to ensure rapid break in."
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04-23-07, 12:01 PM
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The oil I use is idemitsu rotary racing oil 20w 50 I have never had a problem with this oil, check it out and see what you think . You can get it from Rotary performance (RX7.COM ) http://rx7.com/store/rx7/fdengine_maintenance.html
04-26-07, 08:58 AM
#9
Originally Posted by TITO2
The oil I use is idemitsu rotary racing oil 20w 50 I have never had a problem with this oil, check it out and see what you think . You can get it from Rotary performance (RX7.COM ) http://rx7.com/store/rx7/fdengine_maintenance.html
04-26-07, 11:13 AM
#10
Originally Posted by TRWeiss1
I was thinking about picking up some of this stuff. However, pertaining to Chuck's post, I have a question...What constitutes cold weather vs. hot? I am in NY, and when my RX-7 arrives (around May 8th), it really won't be either.
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