numbers matching? original engine?

[mike16]

Originally Posted by Chevyland

What's up special-k

What I was saying. Was
There was a difference of about 200k of reliable driving time
Between our small block engines
And
The Ls engines of today

Typically around 100k or so, before a rebuild (70's)
Vs
300k many times on modern engines (2000's)

apples and oranges

the machining process's were/are different

fi vs carbs

the lubes used or unavailable then vs the lubes used and avilable now

and a comparrison simply based on the milage achieved then vs now is not entirely accurate

my company had early 70'strucks that burned propane. these trucks regularly got upwards of 300k miles on them. many volvo's and mecedese benze's got easily close to 300k miles on them. no. not diesles either.

I understand what your point is but milage alone is not the only factor that differentiates real engines from that 'other' type. many variables, variables not differences.

FI does help atomise todays fuel that carbs seem to have difficulty atomising.

[Chevyland]

Originally Posted by mike16

apples and oranges

the machining process's were/are different

fi vs carbs

the lubes used or unavailable then vs the lubes used and avilable now

and a comparrison simply based on the milage achieved then vs now is not entirely accurate

my company had early 70'strucks that burned propane. these trucks regularly got upwards of 300k miles on them. many volvo's and mecedese benze's got easily close to 300k miles on them. no. not diesles either.

I understand what your point is but milage alone is not the only factor that differentiates real engines from that 'other' type. many variables, variables not differences.

FI does help atomise todays fuel that carbs seem to have difficulty atomising.

I am only a contractor
That has had a bunch of chevy trucks, in the last 30 years
Are you saying, if I rebuilt my 67-72 chevy engine
And used today's lubes
It would last longer?

I don't know how to work on carburetor
And
Definitely not today 's fuel injection
I don't even know how atomizing works

My only conclusion
Is
The old trucks went around 100k(or a little more if you were lucky)
And
My mid 90's and up trucks
Basically
Go to 300k
Just by changing the oil on time

I was once told
(Don't know if it is true or not)
When emissions came into play
All, the tolerances, had to be shored up on american vehicles
Therefore
They lasted longer
Like Mercedes and Porsche
Because, they were already ahead of us, by then
My father in law was a European mechanic. He has always said
Both of those cars have always been at the top
Their(tolerances)
Are almost like race engines

[FirstOwner69]

Regarding engine longevity, I agree with most of the reasons already stated including improved fuels and oils as well as improved tolerances, and machining. I don't recall anyone mentioning RPMs at highway speeds. Overdrive transmissions have reduced 65 MPH RPMs from about 3000 to closer to 2000. Hell, my '99 Vette with a 6-speed manual barely turns 2400 at 100 MPH!

[Chevyland]

Originally Posted by FirstOwner69

Regarding engine longevity, I agree with most of the reasons already stated including improved fuels and oils as well as improved tolerances, and machining. I don't recall anyone mentioning RPMs at highway speeds. Overdrive transmissions have reduced 65 MPH RPMs from about 3000 to closer to 2000. Hell, my '99 Vette with a 6-speed manual barely turns 2400 at 100 MPH!

Good point👍
Like everything else
Everything
Just gets perfected in time