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#1271352 - 10/31/08 10:25 PM High Mileage Vs. Synthetic
MiniTransAm Offline

Registered: 06/05/08
Posts: 68
Loc: Lancaster, PA
Hey guys.

Currently 3 of my vehicles have over 75K on them. A 99 and 01 Sunfire GT and a 99 Outback. I really want to use a Synthetic Oil but also want the benefits of high mileage additives. The closest I have found is the Valvoline Max Life semi synthetic. I know valvoline also makes a full synthetic high mileage but it's not available in stores around me and is god awful expensive to order.

I've been very impressed by the Penzoil Platinum lately in my Trans Am. Oil pressure was much higher at idle than with the mobil1. Also I notice that synthetics are thinner when colder which is better for start up protection.

What about using PP and substituting one quart of HM oil? Or should I just switch them all to Maxlife and be happy?
2002 Trans Am WS6 (Maxlife 10w30)
2001 Sunfire GT (Maxlife 5w30)
1999 Sunfire GT - Wife's (Maxlife 5w30)
1999 Subaru Outback - Wife's (Maxlife 5w30)

#1271354 - 10/31/08 10:29 PM Re: High Mileage Vs. Synthetic [Re: MiniTransAm]
JonnyHotcakes Offline

Registered: 02/22/08
Posts: 217
Loc: NY
Strait up PP will be fine.

Of course so would Maxlife.

I don't like to mix, you'll just be diluting the add pack.
I change my oil every 50k, whether it needs it or not.

#1271393 - 10/31/08 11:52 PM Re: High Mileage Vs. Synthetic [Re: JonnyHotcakes]
oilboy123 Offline

Registered: 12/05/03
Posts: 6938
Loc: Everett, Washington
Why not run your favorite with a 3-4 ox Auto-RX maintenance dose. Keeps all the seals in good shape as well as keeping the engine internals clean.

Just a thought.
“Loyalty to country ALWAYS. Loyalty to government, when it deserves it.”
― Mark Twain

#1271416 - 11/01/08 12:30 AM Re: High Mileage Vs. Synthetic [Re: oilboy123]
Spartuss Offline

Registered: 12/16/06
Posts: 2087
Loc: Baltimore, Maryland
If your vehicles are not leaking or burning oil, run PP.
Was once a BITOG addict!

#1271428 - 11/01/08 01:13 AM Re: High Mileage Vs. Synthetic [Re: Spartuss]
rg200amp Offline

Registered: 02/10/08
Posts: 3130
Loc: Phila,PA
+1 On PP. It is a great oil.
// 2013 Subaru WRX //
-11 Volkswagen Jetta
-04 Lincoln LS
-01 Ford F250
-04 Mazda Rx-8
-97 Jeep Wrangler
-97 BMW M3
-97 Nissan Maxima

#1271449 - 11/01/08 02:44 AM Re: High Mileage Vs. Synthetic [Re: rg200amp]
ARB1977 Offline

Registered: 06/12/05
Posts: 4845
Loc: North Texas
Ran PP and now Maxlife, both great oils.
2015 Tacoma 4.0L 44K (as of 3-15-17)
M1 0W30 & BioTech / Toyota filter

2008 CRV 2.4L 164K (as of 4-19-17)
Maxlife 5W20 / M1 filter

#1271475 - 11/01/08 04:40 AM Re: High Mileage Vs. Synthetic [Re: ARB1977]
ZZman Offline

Registered: 03/17/08
Posts: 4249
Loc: Michigan
You do not have a Walmart nearby?

They will probably have the full SYN Maxlife and Mobil 1 HM.
2006 Mercury Grand Marquis. Castrol Edge High Mileage oil
2008 Sebring Hardtop convertible. Castrol Edge High Mileage oil
2006 Kawasaki Vulcan 900 LT

#1271492 - 11/01/08 05:31 AM Re: High Mileage Vs. Synthetic [Re: ZZman]
Turk Offline

Registered: 02/03/06
Posts: 9103
Loc: MN
Go with the PP. You don't need maxlife yet.
03 GMC Sierra 4x4 200k M1 0-40+PU
00 Saturn SL2 89 YO Lady Car 92k, Edge Ext
98 Saturn SC2 Rare "Red Hot" 165k, Edge Ext
97 Camry 245k, Maxlife

#1271514 - 11/01/08 06:59 AM Re: High Mileage Vs. Synthetic [Re: Turk]
MiniTransAm Offline

Registered: 06/05/08
Posts: 68
Loc: Lancaster, PA
Have 3 walmarts near me. None of them carry the Full Synthetic. The full Synthetic is in a SILVER bottle. The semi is what is in the red bottles and is what is commonly available.

The Subaru does leak oil a little. Both the Sunfire's also burn at least a quart every 3K. The oil burning is what made me switch from Mobil 1. My sunfire (the 01) Has maxlife in it now. It's the first fill since I switched. Think I should do another oil change with it and see if my consumption goes down? It burned a quart after 2K.
2002 Trans Am WS6 (Maxlife 10w30)
2001 Sunfire GT (Maxlife 5w30)
1999 Sunfire GT - Wife's (Maxlife 5w30)
1999 Subaru Outback - Wife's (Maxlife 5w30)

#1271523 - 11/01/08 07:18 AM Re: High Mileage Vs. Synthetic [Re: MiniTransAm]
Nickdfresh Offline

Registered: 03/15/06
Posts: 5260
Loc: Buffalo, NY
If you're burning that much on a Sunfire, I'd use the MaxLife blend over the PP.

I've MaxLife 10W-30 in mine (2.2L SE- not as much fun to drive as yours, but a very stout engine) with no noticeable consumption. And that's with an upper valve cover leak and an engine that was abused on at least the previous oil change (the oil looked like tar) though the new oil is still relatively clean after 1500 miles...

Incidentally, Mobil1 DOES make a high mileage in both 10W-30 and 10W-40 weights, but I'd skip synthetic if you're burning that much...

The Subaru might be a good candidate for the Mobil1 HM 10W-30 though, but I'd go for an extended OCI (of 6-7.5K) or else you're wasting your $$.

Edited by Nickdfresh (11/01/08 07:21 AM)

#1271529 - 11/01/08 07:23 AM Re: High Mileage Vs. Synthetic [Re: Nickdfresh]
Nickdfresh Offline

Registered: 03/15/06
Posts: 5260
Loc: Buffalo, NY
You could also try Pennzoil or Castrol HM oils, as I think they are a little thicker than Valvoline MaxLife...