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Castrol 5w-20 HM!?? #4602055
12/12/17 08:53 PM
12/12/17 08:53 PM
Joined: Feb 2016
Posts: 517
GA
miden851 Offline OP
miden851  Offline OP
Joined: Feb 2016
Posts: 517
GA
Iím using it in my Mazda in last 40K miles as a staple oil; how good this oil is, how often would you change it and what would be your alternative please

I Thank You


2008 Mazda6i GT; @202K miles
2016 Honda CR-V EX-L; @33K miles
Re: Castrol 5w-20 HM!?? [Re: miden851] #4602070
12/12/17 08:59 PM
12/12/17 08:59 PM
Joined: Apr 2015
Posts: 279
Georgia
Charlie2015 Offline
Charlie2015  Offline
Joined: Apr 2015
Posts: 279
Georgia
Every 3000 miles, but I only do city driving.


1998 Honda Accord EX 2.3L Auto
2009 Scion TC Manual
Re: Castrol 5w-20 HM!?? [Re: miden851] #4602082
12/12/17 09:07 PM
12/12/17 09:07 PM
Joined: Mar 2013
Posts: 4,754
The Midwest
skyactiv Online content
skyactiv  Online Content
Joined: Mar 2013
Posts: 4,754
The Midwest
The oil is good. You really cant go wrong with any of the well known oils today if your using the correct viscosity and type called for by your vehicles manufacture.
I'd change the oil every 6K miles if you drive both city and highway in the Mazda. I wouldn't be afraid to use Valvoline, Kendall, Supertech, Quaker State and so on and so forth. I'd probably use Valvoline Maxlife myself as it is a proven high mileage oil.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Castrol 5w-20 HM!?? [Re: miden851] #4602108
12/12/17 09:32 PM
12/12/17 09:32 PM
Joined: Jan 2008
Posts: 10,656
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,656
OH
It's a good quality oil and I'd run it 5k miles. Probably a waste of money dumping at any mileage less than that.

But Castrol Magnatec is on sale at Walmart for $17.88 right now and is a full synthetic. I'd probably lean towards that for a few bucks more.

Re: Castrol 5w-20 HM!?? [Re: miden851] #4602168
12/12/17 10:35 PM
12/12/17 10:35 PM
Joined: Aug 2004
Posts: 4,628
Katy, Republic of Texas
blupupher Offline
blupupher  Offline
Joined: Aug 2004
Posts: 4,628
Katy, Republic of Texas
I have a few gallons of it I plan to use in my brother in laws '04 F150. It will be changed every 6 months or so (3000-5000 miles). It sees lots of short trips though.
While it is not marketed as a syn-blend, seems I say somewhere it basically could be called one.


1994 Honda VT1100: Peak 15w-40/PSL/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI

Re: Castrol 5w-20 HM!?? [Re: skyactiv] #4602212
12/13/17 12:06 AM
12/13/17 12:06 AM
Joined: Jul 2011
Posts: 529
Michigan
Eosyn Offline
Eosyn  Offline
Joined: Jul 2011
Posts: 529
Michigan
Originally Posted By: skyactiv
The oil is good. You really cant go wrong with any of the well known oils today if your using the correct viscosity and type called for by your vehicles manufacture.
I'd change the oil every 6K miles if you drive both city and highway in the Mazda. I wouldn't be afraid to use Valvoline, Kendall, Supertech, Quaker State and so on and so forth. I'd probably use Valvoline Maxlife myself as it is a proven high mileage oil.


Agreed. I personally like using Valvoline Maxlife full synthetic and change every 6k miles or 6 months (Oct & April). I also change the oil filter every time. I also like using Castrol Magnatec even though it's not a HM oil. Both Oil have the engines running very smooth and quiet. I'm willing to use Castrol Edge HM when it gets to $20 or less per jug.


02 Toyota Celica GT: 194k, VML 5W30/Denso filter
05 Toyota Corolla LE: 151k, VML 5W30/Bosch filter
15 Chevy Malibu LT: 37k, VML 0W20/Denso filter
Re: Castrol 5w-20 HM!?? [Re: Charlie2015] #4602695
12/13/17 04:33 PM
12/13/17 04:33 PM
Joined: Oct 2012
Posts: 1,211
Rabbit Creek, Alaska
jayg Offline
jayg  Offline
Joined: Oct 2012
Posts: 1,211
Rabbit Creek, Alaska
Originally Posted By: Charlie2015
Every 3000 miles, but I only do city driving.


If anybody is doing that, the cheapest SN oil you can find on sale rather than a HM oil would probably be a better bet.


Ď17 Ram 1500 Ecodiesel- RT6 5w40
'15 Prius C Napa 0w20
'73 240Z 10w30 VWC from '73
'73 Triumph Tiger 750 M1 5w50
'67 BSA 441 Victor Special M1 5w50




Re: Castrol 5w-20 HM!?? [Re: miden851] #4602765
12/13/17 06:08 PM
12/13/17 06:08 PM
Joined: Feb 2016
Posts: 517
GA
miden851 Offline OP
miden851  Offline OP
Joined: Feb 2016
Posts: 517
GA
Thanks for Yíall input;

I asked this question because I replaced the valve cover gasket about 3 years ago and now it started to leak again on this oil; Ill replace it again but Iím trying to figure underlining cause for this; maybe different HM oil would help or other brand is better for my case; I tend to replace oil at 3k too due to pvc valve (never been replaced; also I donít know it it functioning or not)and I understand fresh oil in the engine will keep it in working order longer and of course due to cheap price of oil to begin with

Also if anyone knows difference between Castrol HM vs GTX because the price is the same at Walmart; I may think I get a better deal with HM than with GTX

Again I thank you all for your constructive input!

Last edited by miden851; 12/13/17 06:12 PM.

2008 Mazda6i GT; @202K miles
2016 Honda CR-V EX-L; @33K miles
Re: Castrol 5w-20 HM!?? [Re: miden851] #4602797
12/13/17 06:57 PM
12/13/17 06:57 PM
Joined: Aug 2004
Posts: 4,628
Katy, Republic of Texas
blupupher Offline
blupupher  Offline
Joined: Aug 2004
Posts: 4,628
Katy, Republic of Texas
HM will just have some seal swelling additives. Overall add pack may be a little better, but regular GTX is a good oil as well


1994 Honda VT1100: Peak 15w-40/PSL/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI

Re: Castrol 5w-20 HM!?? [Re: miden851] #4602857
12/13/17 08:09 PM
12/13/17 08:09 PM
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
Have you tried retorquing the valve cover bolts? Worth a try


2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30
Re: Castrol 5w-20 HM!?? [Re: SilverFusion2010] #4602896
12/13/17 08:51 PM
12/13/17 08:51 PM
Joined: Feb 2016
Posts: 517
GA
miden851 Offline OP
miden851  Offline OP
Joined: Feb 2016
Posts: 517
GA
Originally Posted By: SilverFusion2010
Have you tried retorquing the valve cover bolts? Worth a try

I may try do that too; honestly, I never bother doing it originally because just the replacement was enough to stop the leak; I bought another gasket meanwhile as well as pcv valve which is a 2 day work to replace as you may know on this car; Iím afraid if I replace the valve it is going to be in a perfect condition so Id spent 2 wrenching days for nothing WWF


2008 Mazda6i GT; @202K miles
2016 Honda CR-V EX-L; @33K miles

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