Honda Prelude Forum - Prelude Online.com - View Single Post - Post your Blackstone oil analysis! *56k beware*

TimeRacer · 05-07-2005, 01:35 PM

Why would high iron be from a crappy oil filter? Unless you think the steel plates inside the oil filter are oxidizing or something and putting the iron residue into the oil mix. I'd highly doubt that from ANY reputable oil filter company.

The TBN is really needs to be based upon what the oil starts with. I know Mobil 1 (Tri-Syn and the previous gen ... Syn.. something) were around a 12.8 TBN to begin with. You really don't want your TBN to go into the 2's generally (1 and below is the uh oh level) as the TAN (acid instead of base) generally ends up being around 1.2-1.8 for most oils. So I think you should be fine w/ another 1500 miles.

It'll be another ~3.5k miles on my current oil (it's about 6k old) before I send mine in.

Paulg: Is there any specific reason why you chose Castrol Syntec in general? There's a ton of oils that are better than that one which are quite a bit cheaper. I'd be a little worried about the iron too... The silicon isn't from a "clogged" air filter either, cleaning it will actually only increase the silicone content in the oil. As dirty filters actually clean air better (think of a beaver dam) unless you have deposits of sand directly on or under the filter. Do you live in a rural area that you need to go off pavement?

Daemione: I'd be worried about that flash point along with the fact that the oil is already exhibiting the Amsoil's weird attribute of thickening up with use. I'd consider highly changing oils esp with your 5 quarts make up in less than 6000 miles. That iron isn't pretty either and from what I've read Amsoil isn't known to have any iron in their oil (GC does occasionally along with Redline). I wouldn't trust that TBN at all considering the amount of make up oil that was needed.

Gloc: What oil filter are you using? Seems like which ever one you're using is a) has really bad filtration properties or b) is starting to bypass. Either way it's probably a good idea to possibly consider going with another brand/type. As that border line insoluble level is a tad high. Did you change oils or did your oil change formulation between your two samples? If it didn't, I'd be worried about those moly levels. While moly is usually good in an oil, you don't want moly to be coming from your engine. Usually that means piston rings.

05-07-2005, 01:35 PM	#19 (permalink)
TimeRacer PreludeOnline Premium Member Join Date: Jan 2001 Location: Fremont, CA Posts: 3,036 iTrader: (0)	Why would high iron be from a crappy oil filter? Unless you think the steel plates inside the oil filter are oxidizing or something and putting the iron residue into the oil mix. I'd highly doubt that from ANY reputable oil filter company. The TBN is really needs to be based upon what the oil starts with. I know Mobil 1 (Tri-Syn and the previous gen ... Syn.. something) were around a 12.8 TBN to begin with. You really don't want your TBN to go into the 2's generally (1 and below is the uh oh level) as the TAN (acid instead of base) generally ends up being around 1.2-1.8 for most oils. So I think you should be fine w/ another 1500 miles. It'll be another ~3.5k miles on my current oil (it's about 6k old) before I send mine in. Paulg: Is there any specific reason why you chose Castrol Syntec in general? There's a ton of oils that are better than that one which are quite a bit cheaper. I'd be a little worried about the iron too... The silicon isn't from a "clogged" air filter either, cleaning it will actually only increase the silicone content in the oil. As dirty filters actually clean air better (think of a beaver dam) unless you have deposits of sand directly on or under the filter. Do you live in a rural area that you need to go off pavement? Daemione: I'd be worried about that flash point along with the fact that the oil is already exhibiting the Amsoil's weird attribute of thickening up with use. I'd consider highly changing oils esp with your 5 quarts make up in less than 6000 miles. That iron isn't pretty either and from what I've read Amsoil isn't known to have any iron in their oil (GC does occasionally along with Redline). I wouldn't trust that TBN at all considering the amount of make up oil that was needed. Gloc: What oil filter are you using? Seems like which ever one you're using is a) has really bad filtration properties or b) is starting to bypass. Either way it's probably a good idea to possibly consider going with another brand/type. As that border line insoluble level is a tad high. Did you change oils or did your oil change formulation between your two samples? If it didn't, I'd be worried about those moly levels. While moly is usually good in an oil, you don't want moly to be coming from your engine. Usually that means piston rings. __________________ FS: Shocks, springs, bulbs and other items Last edited by TimeRacer : 05-07-2005 at 01:46 PM.