synthetic oil for LT 5 - ZR-1 Net Registry Forums

Vetman · 02-25-2013

I understant Mark Haibeck recommends AMS oil synthetic for the LT 5. There are a number of types of AMS oil synthetics. Which is the best one for our LT 5 engines and is there another brand anyone else would recommend. Also, which oil filter is most effective holding oil?

efnfast · 02-25-2013

Marc recommends the Amsoil 10-40 high zinc. He also recommends the AC Delco AC970C oil filter. I run both of these.

secondchance · 02-25-2013

I use Mobil 1 High mileage 10-30. Mobil 1 High milege 10-30 has 1000 ppm of phosphorus and 1100 ppm of zinc.

Vetman · 02-25-2013

Amsoil had two 10-40 synthetics. one is 10-40 XL for 7.95. and the other is 10-40 premium for 10.10. The more expensive appears a little better on the test results posted. Also has a longer extended life service. Is the more expensive one necessary? Suggestions? My LT 5 is stock, 61,000 miles and runs perfect, right to 7000. Car is not raced. I just love the smooth, massive power and historic significance of the ZR-1.

SteelBlueZR1 · 02-25-2013

I also use Mobil 1 High mileage 10-30, which Marc approves for the LT5 and is easy to find at WalMart.

Kevin · 02-25-2013

i've been using normal mobil one, i need to switch to high milage

efnfast · 02-26-2013

High zinc levels are what is important. Old oils had higher zinc levels, the new oils don't. That's why most of us run some special oil.

HAWAIIZR-1 · 02-26-2013

I used to use AMSOIL AMO 10W-40 as recommended by Marc, but just switched to AMSOIL ZROD 10W-30 after recommendation by AMSOIL and one of their reps. A case is on the way so I have not actually tried it yet. After seeing what Yun and others are using with Mobil 1 high mileage 10W-30 I may use that instead with it being so easy to get and no shipping to pay for. I just mailed off an oil sample (Blackstone Laboratories) to see how the AMSOIL AMO 10W-40 is doing after rebuild break in and what the phosphorus and zinc actually is.

As for oil filter, check out all of Marc's research and you can't go wrong: http://www.zr1specialist.com/HAT%20W...ers%202006.htm

I bought a case of Fram TG3985 for about $2 each when Rockauto.com had their closeout so I guess I have a lifetime supply and I see Marc has updated recommendation since.

Starman · 02-26-2013

I use a 50/50 blend of Red Line racing and street oil. Both are high in the EP additives, but this is not a cheap option.

Dynomite · 02-26-2013

Quote:

Originally Posted by HAWAIIZR-1

I just mailed off an oil sample (Blackstone Laboratories) to see how the AMSOIL AMO 10W-40 is doing after rebuild break in and what the phosphorus and zinc actually is.

As for oil filter, check out all of Marc's research and you can't go wrong: http://www.zr1specialist.com/HAT%20W...ers%202006.htm

Craig.......I use AMSOIL 10W-40 as Marc suggests/suggested. But may switch to AMSOIL 10W-30 (where it is colder) if it is essentially the same except for weight. Let us know what Blackstone says

Cliff

02-25-2013	#1
Vetman Join Date: Feb 2013 Location: Yakima Washington Posts: 401	synthetic oil for LT 5 I understant Mark Haibeck recommends AMS oil synthetic for the LT 5. There are a number of types of AMS oil synthetics. Which is the best one for our LT 5 engines and is there another brand anyone else would recommend. Also, which oil filter is most effective holding oil? __________________ Jim 1990 Z # 2441 1959 c-1 230 HP 4 speed frost blue/silver 3 owner 2011 cts-v 556 HP, manual 6 speed 1955 chev 2dr ht PP 265 3 speed w/OD

02-25-2013	#2
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,334	Re: synthetic oil for LT 5 Marc recommends the Amsoil 10-40 high zinc. He also recommends the AC Delco AC970C oil filter. I run both of these.

02-25-2013	#3
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,710	Re: synthetic oil for LT 5 I use Mobil 1 High mileage 10-30. Mobil 1 High milege 10-30 has 1000 ppm of phosphorus and 1100 ppm of zinc.

02-25-2013	#4
Vetman Join Date: Feb 2013 Location: Yakima Washington Posts: 401	Re: synthetic oil for LT 5 Amsoil had two 10-40 synthetics. one is 10-40 XL for 7.95. and the other is 10-40 premium for 10.10. The more expensive appears a little better on the test results posted. Also has a longer extended life service. Is the more expensive one necessary? Suggestions? My LT 5 is stock, 61,000 miles and runs perfect, right to 7000. Car is not raced. I just love the smooth, massive power and historic significance of the ZR-1. __________________ Jim 1990 Z # 2441 1959 c-1 230 HP 4 speed frost blue/silver 3 owner 2011 cts-v 556 HP, manual 6 speed 1955 chev 2dr ht PP 265 3 speed w/OD

02-25-2013	#5
SteelBlueZR1 Join Date: Aug 2011 Location: Evergreen, Co. Posts: 346	Re: synthetic oil for LT 5 I also use Mobil 1 High mileage 10-30, which Marc approves for the LT5 and is easy to find at WalMart. __________________ Bert Rankin 1991 ZR1 Steel Blue / Steel Blue #1029 Haibeck chip, slotted rotors, camber brace, C-beam plates, OBX exhaust, Nitto NT555 tires [SIGPIC][/SIGPIC]

02-25-2013	#6
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,633	Re: synthetic oil for LT 5 i've been using normal mobil one, i need to switch to high milage __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

02-26-2013	#7
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,334	Re: synthetic oil for LT 5 High zinc levels are what is important. Old oils had higher zinc levels, the new oils don't. That's why most of us run some special oil.

02-26-2013	#8
HAWAIIZR-1 Join Date: May 2010 Location: Japan Posts: 3,566	Re: synthetic oil for LT 5 I used to use AMSOIL AMO 10W-40 as recommended by Marc, but just switched to AMSOIL ZROD 10W-30 after recommendation by AMSOIL and one of their reps. A case is on the way so I have not actually tried it yet. After seeing what Yun and others are using with Mobil 1 high mileage 10W-30 I may use that instead with it being so easy to get and no shipping to pay for. I just mailed off an oil sample (Blackstone Laboratories) to see how the AMSOIL AMO 10W-40 is doing after rebuild break in and what the phosphorus and zinc actually is. As for oil filter, check out all of Marc's research and you can't go wrong: http://www.zr1specialist.com/HAT%20W...ers%202006.htm I bought a case of Fram TG3985 for about $2 each when Rockauto.com had their closeout so I guess I have a lifetime supply and I see Marc has updated recommendation since. __________________ Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 Last edited by HAWAIIZR-1; 02-26-2013 at 07:57 AM.

02-26-2013	#9
Starman Join Date: Sep 2008 Location: Speedway, IN Posts: 125	Re: synthetic oil for LT 5 I use a 50/50 blend of Red Line racing and street oil. Both are high in the EP additives, but this is not a cheap option.