I recently purchased a 2005 Infiniti G35 sedan. Coming up on 3750 miles and first oil change. Manual says I can use 5W-30, 10W-30 or 10W-40. OCI is 3750 for severe and 7500 for moderate driving. Please advise if M1EP 10W-40 would be best bet with 7500 oci
new car, advice please
- Thread starter krisi
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I'm thinking, since it gets pretty chilly in NYC, that 10w-40 EP would not be a good choice. I do recall seeing that the VQ35 engines like a high 30 weight/low 40 weight. I remember seeing some really bad API starburst rated 30 weight results but the best one so far I've seen in this engine was with 15w-40. For that reason, I would shoose a 5w-40 oil such as Mobil 1 Truck and SUV.
Mobil 1 EP 10w40 is actually less viscous than Mobil 1 T&SUV 5w40 down to -4F, so that logic doesn't hold.
krisi, do you still park your car in a heated garage in NYC and drive mostly highway miles? I believe given your use of the vehicle the Mobil 1 5w30 would give you several 100K miles of trouble-free motoring. But if you will sleep better with more viscous oil with more additives in it, I wouldn't go any thicker than the Mobil 1 EP 10w40 on a nice tight new engine.
The only bad UOAs I recall seeing with this engine and Mobil 1 was an engine with silicon ingestion issues.
Hope that helps. Nice ride by the way.
The Mobil website recommends Mobil 1 5w30 when in warranty, and Mobil 1 EP 5w30 when out of warranty. This is probably due to the fact that manufacturers now have to warranty the catalytic converter for something like 100K miles now.
krisi, do you still park your car in a heated garage in NYC and drive mostly highway miles? I believe given your use of the vehicle the Mobil 1 5w30 would give you several 100K miles of trouble-free motoring. But if you will sleep better with more viscous oil with more additives in it, I wouldn't go any thicker than the Mobil 1 EP 10w40 on a nice tight new engine.
The only bad UOAs I recall seeing with this engine and Mobil 1 was an engine with silicon ingestion issues.
Hope that helps. Nice ride by the way.
Tks for the replies. I will be keeping the car in a heated garage and doing almost exclusively highway miles (about 30K/yr). I want to use Infiniti's moderate mainenance schedule which calls for 7500 oci. The manual does recommend 5W-30 above all else, but 'perfectly acceptable' is 10W=30 or 10W-40. I'll use the 5W-30 M1 EP but change at the 7500 mark faithfully until warranty expires. FYI, the dealer three in a 6 yr/100,000 mile bumper-to-bumper to sweeten the sale. The only reason I didn't get another Buick is because my company does a lot of business with them and the vibrations we are getting is that Buick may go out of business. The last Buick cost me a bet. I bet that it would see 300,000 trouble-free miles, but, the transmission went at 299,258.
I forgot about your hatred for HDEOs 427. But I checked it out, and your indeed correct about the viscosities. 10w-40 EP could be labelled 5w I'm thinkin, just based on the viscosity index. That would probably contradict MRV and CCS numbers though. ****, I can't get over how much thicker the 5w-40 TSUV is! The only place where it's "thinner" than the 10w-40 would be right at the limits of where they test for 5w/10w etc. like -30C. Once again, ya got to look at the numbers. 5w/10w doesn't really tell ya much!
I don't hate HDEOs. They have their place in the correct applications. A lot of people see more viscosity, more additives and conclude it must be better all the time. Recall that HDEOs are formulated for low RPM, heavy duty, usually turbocharged, diesel engines.
Krisi looking for M1 10W-40 is like looking for hen's teeth down here. I expect the product will not be available and may get the axe. I expect the product to be a flash in the pan.
I'm expecting the 10W-40 to be discotinued for those that ever see it at all.
It's probably great, but I think Exxon will drop it. It a great product that probably won't move, imho.
I'm expecting the 10W-40 to be discotinued for those that ever see it at all.
It's probably great, but I think Exxon will drop it. It a great product that probably won't move, imho.
427 - Thanks for the chart, but it doesn't make any sense to me.
C'mon, does it make sense to you?
It's obliterates any meaning to labeled viscosity.
C'mon, does it make sense to you?
It's obliterates any meaning to labeled viscosity.
It makes perfect sense to me. The only temp where 5w-40 is thinner than 10w-40 for these 2 oils is at around -35C, right where Cold Cranking viscosity is measured for 5W. It means that there are 10w-30s and 10w-40s out there that are much much thinner than some 5w-30s and 5w-40s out there in cold temperatures up to a point (the point at which snot is freezing solid in your nose), in terms of kinematic viscosity. But, like I said, does that translate into better MRV and cold cranking numbers as well up to that point??
mechtech, may I suggest you read up on how viscosity grades are determined. Also note we're talking about full synthetics in this thread and that I limit the chart to -20C. As you approach the pour points, extrapolation from the VI is much less accurate.
One more clue for you guys:
cP = specific gravity x cSt
cP = specific gravity x cSt
JHZR2
Staff member
I would go with M1 10w-30, or EP if youre daring.
JMH
JMH
Triple_Se7en
$50 Site Donor 2024
I will 2nd that 10W-30 suggestion above. It fits your city's climate & your vehicle recomendations.
I spent a week in Manhattan recently... even venturing to the Bronx and Queens to see your Yankees/Mets baseball teams play too.
Had a great time -- except for emptying my credit cards there.... lol
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