I know oil is only one factor in determining the actual OCI. But generally, is there one or two dino oil you can think of that can approach the factory's regular recommendated OCI of 7,500 miles?
Can Any Dino Oil Go 7,5k Miles OCI?
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Shaeffers probably could, but I forget if it's dino or a blend...
Patman
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They sell a conventional, a blend and a full synthetic, but the most commonly used one on here is the Supreme 7000 blend series.
Chevron Delo 15w-40 seems to be the best mineral for longer intervals. Basically, look for any HDEO oil that is made for fleet/diesel use.
I assume you are talking about "domestic" makers or those you have knowledge off. My friend had an Avalon that beat up Mobil 1 in relatively short oci's. That was his only solution, syn and short oci's. I like to see a proven track record before I trust the manufacturer.
This is such an engine dependent question, there can't be a universal answer.
There was a UOA posted a little bit ago using Castrol GTX 5w-30 in a Toyota truck (correct me if I'm wrong), with 7,300 miles on it. And the results were pretty **** good.
They were mainly highway miles, and in an engine that's probably pretty easy on oil. I would NOT run any dino in my car for that long though.
They were mainly highway miles, and in an engine that's probably pretty easy on oil. I would NOT run any dino in my car for that long though.
I had the same idea when I ran these tests. The 4 cylinder Honda is a little harder on oil than some engines.
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=001594
My Tacoma had a little TBN to spare:
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=001528
Contrary to what was stated above about my driving, neither of these vehicles included a lot of highway miles--the majority was country road driving.
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=001594
My Tacoma had a little TBN to spare:
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=001528
Contrary to what was stated above about my driving, neither of these vehicles included a lot of highway miles--the majority was country road driving.
Bamaro: "I dont think the car makers would recommend 7,500 miles if they thought it would harm the engine. That's what is recommended for mine and that is what I do."
They want your car to last a fair amount of time ... but not forever. If the motor goes after 10 years and 125,000 miles, they'd be perfectly happy ...
... but I know I wouldn't!
And look at the people who bought Toyotas and followed the regular schedule ... then had to fight with Toyota for compensation when their engines sludged up and exploded.
If I was leasing a car for just 2-3 years and knew I wouldn't keep it past 50,000 miles nor sell it to a friend, I might do the bare minimum. However, that's yet to be the case with me.
--- Bror Jace
They want your car to last a fair amount of time ... but not forever. If the motor goes after 10 years and 125,000 miles, they'd be perfectly happy ...
... but I know I wouldn't!
And look at the people who bought Toyotas and followed the regular schedule ... then had to fight with Toyota for compensation when their engines sludged up and exploded.
If I was leasing a car for just 2-3 years and knew I wouldn't keep it past 50,000 miles nor sell it to a friend, I might do the bare minimum. However, that's yet to be the case with me.
--- Bror Jace
"Dino oil can go 33,000 miles in a beetle. Just ask my girlfriend. I wouldn't recommend it though."..."I just realized that my last statement was kind of a wise-*** remark. Sorry."
Actually, I like your original comment just the way you said it, CrashZ! Well put...
I suspect that oils in most applications will do just fine at 7,500 miles, although I agree with Bror Jace: Just how much engine wear are you comfortable with?
I kept a March 2002 newspaper article on the Toyota "sludge" engines. Regarding the extreme end of oil longevity in poorly maintained engines, they quoted a noted, retired Valvoline oil researcher (a guy named Norm Hudecki) who said, "Sludge -- also called gelation -- begins to form about 12,000 to 15,000 after an oil change. Most oil will last probably between 12,000 and 15,000 miles, even if it is in a vehicle driven in the city by somebody like a cab driver or police. If you are out on the highway, most oils will last 15,000 miles with no problem. Not long after the 15,000 mark, however, the oil is full of contaminants and the dispersants are saturated."
Note that he wasn't suggesting extending changes beyond 7,500 mi by any means, but was simply commenting on typical oil performance one can expect in very neglected engines. Based on his comments and owner's manuals' instructions, I suspect that going 7,500 mi is perfectly fine -- although certainly not optimal to prevent wear, sludging, and varnishing -- for the vast majority of drivers.
Actually, I like your original comment just the way you said it, CrashZ! Well put...
I suspect that oils in most applications will do just fine at 7,500 miles, although I agree with Bror Jace: Just how much engine wear are you comfortable with?
I kept a March 2002 newspaper article on the Toyota "sludge" engines. Regarding the extreme end of oil longevity in poorly maintained engines, they quoted a noted, retired Valvoline oil researcher (a guy named Norm Hudecki) who said, "Sludge -- also called gelation -- begins to form about 12,000 to 15,000 after an oil change. Most oil will last probably between 12,000 and 15,000 miles, even if it is in a vehicle driven in the city by somebody like a cab driver or police. If you are out on the highway, most oils will last 15,000 miles with no problem. Not long after the 15,000 mark, however, the oil is full of contaminants and the dispersants are saturated."
Note that he wasn't suggesting extending changes beyond 7,500 mi by any means, but was simply commenting on typical oil performance one can expect in very neglected engines. Based on his comments and owner's manuals' instructions, I suspect that going 7,500 mi is perfectly fine -- although certainly not optimal to prevent wear, sludging, and varnishing -- for the vast majority of drivers.
Factory specc'd OCI's here are 10,000kms to 15,000kms all on dino. A few would opt for syn at the dealer but few and far between.
My cars manual (2003 chevrolet 2.2L Ecotec) also calls for Long Trip change intervals of 7500 miles. I too thought this was sort of long for conventional motor oil, but i guess not. Think of how many people must follow that book and not have a problem. This is why with Mobil 1 I have no fear changing my oil at 7500 miles reguardless of the condition I am driving in.
Can't help but wonder what the oil & filter change cost would be there in Australia. We don't have to go 7,500 OCI here - a do-it-youself dino SuperTech oil & filter change is around $5.50 USD. So, changing at 3K or 4K can be done for the cost equivalence of only about 3 gallons of petro, uh, gas. Strictly a personal decision, which is nice.
"Can any dino oil go 7,500 miles OCI?"
Sure. Just how much engine wear are you comfortable with?
--- Bror Jace
Sure. Just how much engine wear are you comfortable with?
--- Bror Jace
Dino oil can go 33,000 miles in a beetle. Just ask my girlfriend. I wouldn't recommend it though.
Just to stir the pot..I read somewhere on the site..SAE paper said that engine wear actually decreases the longer you run it. However, I would only attempt 7500 mile Oci with HDEO or I drove conditions such as no frequent cold starts, no short trips, lots of highway. premium dino in theory should last 7500 like Pennzoil
I just realized that my last statement was kind of a wise-*** remark. Sorry.
But in all seriousness, if you are going to push the limits of dino oil or your manufacture's recomendation, consider doing oil analysis for concrete proof either way.
But in all seriousness, if you are going to push the limits of dino oil or your manufacture's recomendation, consider doing oil analysis for concrete proof either way.
Engine manufacturers recommend drain intervals after their battery of tests and then cut it in half knowing people will put cheap oil in or not change as frequently as they should. Thus a good dino would have tested out at 6k or 7k for them to arrive at a recommended 3k oil change.
Hyundai allows 7,500 mile OCIs with nothing more than SG (at least in their 2003 owner's manuals, and, no, that was not a typo). The significance is that the company also warrants their engines to 10 years/100,000 miles. Nevertheless, I personally know of one Hyundai V6 that will never see anywhere near that number of miles in an OCI...
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