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HM oil help with smog? #4507918
09/05/17 09:28 AM
09/05/17 09:28 AM
Joined: Nov 2013
Posts: 76
Rocklin, CA USA
Nicasio Offline OP
Nicasio  Offline OP
Joined: Nov 2013
Posts: 76
Rocklin, CA USA
I know HM oils help with rubber seals so would you say that would be good for our strict Cali emissions/SMOG checks?

Last edited by Nicasio; 09/05/17 09:31 AM.

2017 Nissan Armada AWD Platinum
2011 Honda Civic DX
2007 Subaru Impreza 2.5i Wagon
2006 Pontiac Vibe
2004 BMW 330i ZHP 6sp
1989 Mustang w/Vortech S/C 351w
Re: HM oil help with smog? [Re: Nicasio] #4507929
09/05/17 09:37 AM
09/05/17 09:37 AM
Joined: Nov 2012
Posts: 234
NorCal
Seventh Offline
Seventh  Offline
Joined: Nov 2012
Posts: 234
NorCal
I guess potentially, if you had some leaky valve stem seals that was slowed by the HM oil. No other seals in the engine could really affect exhaust emissions though...

They only tailpipe test cars that are model year 99 and older though. Anything 2000 or newer is just a check of obd2 monitors, visual and function test.

So for 2000 and later cars, no. It won't help.

Re: HM oil help with smog? [Re: Nicasio] #4507935
09/05/17 09:44 AM
09/05/17 09:44 AM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
If you are having problems passing smog due to oil consumption (primarily) there isn't much you can do to help it.

Maybe adding 6 bottles of STP might help it pass,,,,, maybe not


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: HM oil help with smog? [Re: Nicasio] #4508046
09/05/17 11:57 AM
09/05/17 11:57 AM
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
bigj_16 Offline
bigj_16  Offline
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
Always change your oil just prior to a smog check

Re: HM oil help with smog? [Re: bigj_16] #4508195
09/05/17 03:45 PM
09/05/17 03:45 PM
Joined: Aug 2008
Posts: 2,080
Cali
Malo83 Offline
Malo83  Offline
Joined: Aug 2008
Posts: 2,080
Cali
My 83 Silverado with the 305 has leaky valve guide seals for the last 25 yrs, smokes on the first start of the day, burns off and your good for the rest of the day, use Pennz High Mileage oil, she's passed all here smog checks, key is a good tuneup and oil change before going in for the test and a HOT engine, take my truck out on the highway and run high speeds for about 10 miles then straight to the smog station, been using Guaranteed to Pass fuel additive in the tank, don't know if it works but hey every little bit helps and she hasn't failed yet. Cheers2

Re: HM oil help with smog? [Re: bigj_16] #4510178
09/07/17 04:41 PM
09/07/17 04:41 PM
Joined: Nov 2013
Posts: 76
Rocklin, CA USA
Nicasio Offline OP
Nicasio  Offline OP
Joined: Nov 2013
Posts: 76
Rocklin, CA USA
Originally Posted By: bigj_16
Always change your oil just prior to a smog check

Agreed. I always make sure of this. I remember a friend of mine with his minty IROC Z that he rarely drives failed smog. Had low miles, but oil went bad from sitting too long. Went home & changed the oil & passed SMOG the next day lol


2017 Nissan Armada AWD Platinum
2011 Honda Civic DX
2007 Subaru Impreza 2.5i Wagon
2006 Pontiac Vibe
2004 BMW 330i ZHP 6sp
1989 Mustang w/Vortech S/C 351w

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