Royal Purple Oil and Filter

After my maintenance plan(prepaid) ran out I started pushing any synthetic oil past 4k miles and most times with RP past 5-6k miles. Several times it went past 7-8k miles as Subaru recommends 7500 miles on conventional oil in good driving conditions, so thought I could do that with synthetic even in bad driving conditions. Was a sad lesson to learn the hard way when my engine went out. Started noticing bearing noise a couple oil changes before the engine went, but was complacent since I still had extended warranty on my side. Worked out in the long run minus me totaling the car less than 1k miles after the bottom end was rebuilt/replaced. My truck has been on extended oil change intervals for years now and runs great with over 145k miles on it. And I hammer the engine on a regular basis; oil has been in it up to a year at times before changing it, but usually changed at about 6k miles. When I start running AMSOIL Signature Series in the truck it will go the AMSOIL recommended interval of 25k miles/one year.
 
25k/one year? Im sure its fine, but i would be scared to go that long without an oil change! How often do you change the oil filter then?
 
For the record, most LS engine guys (including myself) love "German" Castrol Syntec. You can get it at most Autozone stores and a few other places. It is a 0W-30 oil and will say "European Formula" on the front. My older Camaro had about 123,xxx miles on it and had a little piston slap on really cold starts. First oil change I did after buying it I switched to German Syntec and the slap went away.
 
bl3ujay07 said:
25k/one year? Im sure its fine, but i would be scared to go that long without an oil change! How often do you change the oil filter then?
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With most filters (cellulose) you need to change them every 5k-8k miles regardless of the oil. But, with AMSOIL's Ea(Absolute Efficiency) filters (synthetic nano), you can go 15k miles/one year[product code Ea15K], or 25k miles/one year [code EaO].
For severe conditions the EaO are limited to 15k miles/one year, while the Ea15K filters are 15k miles/one year regardless of normal or severe service conditions.
The price of AMSOIL's filters is way worth it considering you can go a full year on one and only spend a few dollars more than you would on a performance/extended life filter from a parts store, and with most of them you would have to replace them several times throughout year.
 
After paying for a new turbo, my oil changes are back to 3k. Just not worth it to nickle and dime on something that can do thousands of dollars in damages very quickly. The cost of replacing a Turbo would have paid for a lot of Royal Purple.

If you are going beyond 3k on oil changes (and hopefully sending in samples for testing) keep changing the filters at 3k.
 
I change my filter with every oil change I just can't grasp the claim of a filter lasting 15k-25k.
 
ShaunD said:
With most filters (cellulose) you need to change them every 5k-8k miles regardless of the oil. But, with AMSOIL's Ea(Absolute Efficiency) filters (synthetic nano), you can go 15k miles/one year[product code Ea15K], or 25k miles/one year [code EaO].
For severe conditions the EaO are limited to 15k miles/one year, while the Ea15K filters are 15k miles/one year regardless of normal or severe service conditions.
The price of AMSOIL's filters is way worth it considering you can go a full year on one and only spend a few dollars more than you would on a performance/extended life filter from a parts store, and with most of them you would have to replace them several times throughout year.
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I've been a diehard AMSOIL fanatic for over a decade. Every gas engine I own runs on it, down to my 2 cycle leaf blower!
 
ShaunD said:
With most filters (cellulose) you need to change them every 5k-8k miles regardless of the oil. But, with AMSOIL's Ea(Absolute Efficiency) filters (synthetic nano), you can go 15k miles/one year[product code Ea15K], or 25k miles/one year [code EaO].
For severe conditions the EaO are limited to 15k miles/one year, while the Ea15K filters are 15k miles/one year regardless of normal or severe service conditions.
The price of AMSOIL's filters is way worth it considering you can go a full year on one and only spend a few dollars more than you would on a performance/extended life filter from a parts store, and with most of them you would have to replace them several times throughout year.
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You can not get better oil and filters than Amsoil, period.
 
ryanmcg1 said:
I change my filter with every oil change I just can't grasp the claim of a filter lasting 15k-25k.
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You should change with every oil change, and between changes if you are running your oil past 6k miles. Most store bought filters can't go past 8k miles and are cellulose/synthetic blend filters. However, AMSOIL's Ea filters are "advanced full synthetic nanofiber technology" and filter down to 5 microns, and 15 microns at 98.7%Ea for the like of the filter. Most vehicles, regardless of what the owner feels, are driven more under severe conditions than normal driving conditions, so the 15k mile interval is probably more realistic and safer. Also, AMSOIL doesn't recommend extended service intervals past OEM recs if not running AMSOIL in the engine, or if the vehicle has mechanical issues. The most likely size particle to damage your engine is 25-40 microns as particles larger than those usually get trapped in the filter at any point in the service interval, and particles smaller than 15-25 microns can't find their way into the tight tolerances of modern engines that are in good mechanical condition. So yes, you should trust the standard filter that doesn't advertise to go to extended intervals in your vehicle especially if your aren't running a quality synthetic that is made for extended service intervals.:)
 
LegacyGT said:
After paying for a new turbo, my oil changes are back to 3k. Just not worth it to nickle and dime on something that can do thousands of dollars in damages very quickly. The cost of replacing a Turbo would have paid for a lot of Royal Purple.

If you are going beyond 3k on oil changes (and hopefully sending in samples for testing) keep changing the filters at 3k.
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Did your turbo suffer oil starvation because of the oil filter screen that gets clogged on Subarus?
 
ShaunD said:
Did your turbo suffer oil starvation because of the oil filter screen that gets clogged on Subarus?
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Not sure if it was the banjo bolt filter, I have it sitting in the garage waiting to be disassembled.
 
I never looked at mine to see if it was clogged and/or part of the issue with my engine seizing but, every Subaru dealership/mechanic that ever looked at my STI never said anything about it. You can PM if you aren't gonna post your finds on this thread, or somewhere else. Thanks.:)
 
I use Amsoil in all of my gas engines, just not in my diesel yet. I use only OEM filters. Most aftermarket oil filters do not have the anti drain back valve in them. Without the valve, the oil will drain from the filter. Now, when the engine starts, the oil pump has to fill the oil filter first, then pump it to the rest of the engine.

With the valve in the OEM filters, the filter is already full and the rest of the engine gets oil quicker, with less metal to metal wear time, including the turbo.

Just my preference and $.02 so take it for hwat it's worth. I would rather spend the extra couple of bucks than the extra couple thousand.
 
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AMSOIL filters are equiped with anti-drainback valve, as well as the by-pass valve built to OEM specs. You can also do a remote by-pass filter kit for your diesel from AMSOIL. AMSOIL filters are above and beyond OEM quality and cost the same or a few bucks more, but AMSOIL filters can stay in service 2-3 times longer as long as you are running AMSOIL.:) So no sacrifice there.
 
killrwheels@autogeek said:
I plan to use it first in my new daily driver, a Lacrosse CXS. But value seems so good I might go back and grab two more sets for the truck and Vette. Any recommendations or challenges ???
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Buick LaCrosse:
-ACDelco Synthetic Blend SAE 5W-30 Dexos 1™, or equivalent.
-Filters: 2.4L L4: PF457G, or equivalent; 3.6L V6 PF63, or equivalent.
-As long as the oil is a synthetic blend 5W-30 and has any of these Dexos 1™ logos on it, it is a GM authorized, licensed, Dexos 1™ engine oil.
-(Don't know if the RP you purchased has these logos or not. Hope so.)








For my Corvettes and Truck...I stay with the OEM recommendations. That's just me though.

:)

Bob
 
There "seems" to be nothing substantial in proof to suggest any one of the better oils is truly that much better than others. Obviously you should change it within guidelines and check levels on a normal basis. So like a favorite wax or sealant, most are personal preferences. I do like the idea of shipping out a sample for testing however and might use the link to do so after RP's first use.


I did find that alot of oil filters are private labeled and come from only one or two sources.
 
Setec Astronomy said:
What about those RP filters? Any good? Anyone cut one open?
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Royal Purple is one of the first synthetic filters. Research shows they filter better than other premium filters like Mobil1, K&N, etc.

Amsoil makes great products too.
 
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