Pennzoil Platinum Change Interval

[spotaneagle]

Originally Posted by Project84

Guys, have any of you given thought to looking up the recommended oil change interval in your vehicle's owner manual?

My 1996 Saturn owner's manual recommends changing the oil/filter every 6,500 miles and it makes NO MENTION of synthetic oil. Just says use 5W-30.

I change it at 5,000 because like spot said, the oil is black within the first few hundred miles. I usually run an additive or two between changes also, so I figure the filter has seen some debris by 5k. If my engine didn't burn oil though, I'd go 6,500 miles as recommended. Saving money is saving money.

I've seen oil analysis of synthetic oils from different performance applications where at 5k-7k miles intervals the oil was still very acceptable.

6,500 if you DONT beat on it. maybe

with pennzoil plat right now im at 1500 miles on this change, with barely any discoloration/blackening.

[Ford Man]

Originally Posted by Jay2TheRescue

I think all 0W30 oils from Mobil are synthetic.

I assumed that, but wasn't sure.

[trollbait]

Originally Posted by Jay2TheRescue

I think all 0W30 oils from Mobil are synthetic.

I don't think there's any non-'synthetic' oils that are 0 weight.

If your oil is in the engine for over a year, I wouldn't go by mileage for oil changes. The oil will oxidize and degrade over time, whether or not the engine runs. I understand the extended change interval Amsoil is 25k miles or 1 year. At 18 months and 3000 miles, I'd just stick to that. Great that you have a use for the semi used stuff.

Ford has back certified many of their engines for 5w-20, including the Escort.
http://www.ints.com/support/document...20motoroil.pdf
The Motorcraft synthetic blend can also be had at a good price at wal-mart.

[Jay2TheRescue]

I wanted to say all zero weight was "synthetic", but felt if I said that I might get flamed for some obscure oil that nobody's heard of before sells zero weight dino juice. I felt safe in saying that all zero weight Mobil was synthetic.

As far as the time in crankcase, I feel really bad about it, but the oil in the Buick has been in there almost 2 years. I have Mobil1 Extended Performance 5w30 in it, and it has under 2,000 miles on it.

[Ford Man]

Originally Posted by trollbait

Ford has back certified many of their engines for 5w-20, including the Escort.
http://www.ints.com/support/document...20motoroil.pdf
The Motorcraft synthetic blend can also be had at a good price at wal-mart.

I knew about this, but since I've had such good luck running 10w40 in the '88 and got over 505K miles and still going I figure why switch. (plus I have about 25 cases of 10w40 on hand) I'm not a lubrication speciallist by any means, but I've read articles saying that 15w40 is actually the best weight motor oil for fuel economy and lubrication.

[theholycow]

If it has brought a car to the 505,000 mile mark, it's definitely not time to try something different.

[JanGeo]

WOW at 3K change interval that's a lot of oil changes (168) and lots of oil at 5 quarts per change, that's 210 gallons of oil. Now if you had used Synlube all that time the savings would have been tremendous as well as higher gas mileage and about 4 oil changes . . . hummmm?

[Ford Man]

Originally Posted by JanGeo

WOW at 3K change interval that's a lot of oil changes (168) and lots of oil at 5 quarts per change, that's 210 gallons of oil. Now if you had used Synlube all that time the savings would have been tremendous as well as higher gas mileage and about 4 oil changes . . . hummmm?

I don't change the oil in the '88 every 3000 miles. I'd say it has averaged 5K mile OCI over it's lifetime, using 4 quarts per change. I'm now using Lube Control LC-20 and letting it go their 10K miles recommended oil change interval and have been for about the last 30K miles without any negative effects or change in oil consumption. Of course I will experiment with products on that car that I wouldn't on my better cars. I'll try them on it and if there are no negative effects after long term use 100K miles or more then I'll try them on the better cars.

[add|ct]

Even Amsoil says your car is considered for 'severe' service intervals if you first put Amsoil in your vehicle after 100k miles. It doesn't say if you've used other synthetics all those miles before that, either.

These days, most oil companies synthetic products don't have the amount of ester in the additives package as at first, not sure of Royal Purple though. If they cause more oil loss than normal(adding a Q every 1-2k miles or less in travel), its because of poor maintenance while using conventional oils prior to using a synthetic.