Pennzoil ultra platinum

curry67 · August 19, 2015, 10:33:30 PM

Not to impressed with the motorcraft full sythetic. Noticeably louder idle and when at wot compared to pennzoil Plat but I still haven't matched how smooth the engine is initially after a Mobil 1 change then it went away after 1k miles

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SHOnUup · August 20, 2015, 08:59:43 AM

Quote from: curry67 on August 19, 2015, 10:33:30 PM
Not to impressed with the motorcraft full sythetic. Noticeably louder idle and when at wot compared to pennzoil Plat but I still haven't matched how smooth the engine is initially after a Mobil 1 change then it went away after 1k miles

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If you make the switch to Amsoil, you'll be quite surprised on how much quieter it is...and it lasts at least 4k (my personal experience). If I wasn't so OCD about changing it after ventures to the track or dragway I'd have a bigger interval to attest to. But at 4k it came out in a light brown manner compared to the black look Mobil 1 leaves the motor in.

Rich

Livernois Motorsports · August 20, 2015, 11:30:08 AM

Quote from: markssho on August 19, 2015, 08:34:10 PM
Good info. I was thinking of going full synthetic at the next oil change at the Ford dealer.
Maybe, since I have 59k on the SHO, I should just stick with the Motorcraft synthetic blend I've always used?

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We personally run full synthetic in most all builds here. We use Royal Purple, Brad Penn, and Joe Gibbs depending on the vehicle and customer's preference. Ams Oil makes a great product as well as Rich mentioned as well. I know most all guys I have known to make the switch to Ams Oil have become big advocates and stuck with it which is a good sign.

The biggest thing to be honest is sticking with synthetic if you make the switch. People that jump back and fourth end up with confused engine seal properties which promote oil consumption. The only time I have honestly been against switching to full synthetic were high mileage vehicles. I have witnessed a friend of mine years back that switched to full synthetic in a Ford 4.0 L after he purchased the vehicle. It burned through 3-4 quarts and developed a smoking issue as well in about a month from the service.

BiGMaC · August 20, 2015, 12:19:15 PM

Consider NOAC volatility too since CC blowby is recycled into your turbo intakes coking turbo blades and intake valves... Amsoil and PUP (if you can find it) are the clear winners here.

SHOdded · August 20, 2015, 04:30:13 PM

Not only that, but the viscosity index should hold up as compared to oem spec for 5w30. For example, full synthetic mobil 1 is usually a thinner-behaving oil than say, Motorcraft syn blend. That can be too thin to fill the gap between contact surfaces.

Larrylu · August 21, 2015, 09:43:20 AM

Quote from: SHOdded on August 20, 2015, 04:30:13 PM
Not only that, but the viscosity index should hold up as compared to oem spec for 5w30. For example, full synthetic mobil 1 is usually a thinner-behaving oil than say, Motorcraft syn blend. That can be too thin to fill the gap between contact surfaces.

Are you thinking that it would be advisable to go to a 10/W/30 Mobil 1 from the 5/W/20?

SHOdded · August 21, 2015, 10:02:18 AM

Not at all. You could go to 5W30 from 5W20, but going to 10W is definitely not a good idea. You could go 0W30 if you like.

My point was that before deciding on an appropriate oil, you should compare the PDS (product data sheets) and choose a product with superior specifications (e.g., flow characteristics) to OE. Higher flash points and lower pour points, for example. BTW, a higher viscosity index means a higher resistance to viscosity change/shearing under standardized conditions. That is a good thing. BUT we don't want to significantly deviate from the viscosity itself as specified by OE.

Larrylu · August 21, 2015, 10:17:33 AM

Quote from: SHOdded on August 21, 2015, 10:02:18 AM
Not at all. You could go to 5W30 from 5W20, but going to 10W is definitely not a good idea. You could go 0W30 if you like.

My point was that before deciding on an appropriate oil, you should compare the PDS (product data sheets) and choose a product with superior specifications (e.g., flow characteristics) to OE. Higher flash points and lower pour points, for example. BTW, a higher viscosity index means a higher resistance to viscosity change/shearing under standardized conditions. That is a good thing. BUT we don't want to significantly deviate from the viscosity itself as specified by OE.

Ahh....I see what you are saying!