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1973 Bronco w/original 302 #5214531 09/16/19 05:18 PM
Joined: Sep 2019
Posts: 1
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BKinSD Offline OP
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Joined: Sep 2019
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Hi there, I have an old Bronco with the original 302, still runs quite well. I use 10w30 in it but am interested if others think I should use something else. I drive it year around but not daily, in South Dakota from temps of 0F to 100F, about 3000 miles a year. It has just over 100k on it at present. Thoughts?

Re: 1973 Bronco w/original 302 [Re: BKinSD] #5214534 09/16/19 05:26 PM
Joined: Mar 2013
Posts: 5,993
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skyactiv Offline
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Joined: Mar 2013
Posts: 5,993
Shell Rotella T5 10W30. Available at Walmart.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
2018 Elantra Sport 6 speed manual


Re: 1973 Bronco w/original 302 [Re: BKinSD] #5214537 09/16/19 05:28 PM
Joined: Oct 2004
Posts: 9,513
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bullwinkle Offline
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Or, if you want to save a few $ & have a farm store around, Mystik JT-8 10W30. welcome


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: 1973 Bronco w/original 302 [Re: BKinSD] #5214552 09/16/19 05:51 PM
Joined: Nov 2016
Posts: 1,060
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burla Offline
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5w40 that baby any brand synthetic (I tend to like moly m1, qsud, truck and gas all good choices) and since you don't put a lot of miles pair it will a spun microglass filter, Royal Purple, Amsoil EA, Wix XP and Fram Ultra seam to be the popular ones. Heat cycles and time ruin paper filters, if you do like one oil change a year, has to be spun microglass. The new Bronco's are gonna really be something, but nothing like those old ones. I've let 3 Bronco's go, I hate myself big time, especially the first one I bought off showroom floor and drove for 11 years. 0w40's are good options as well, they are actually built very well and act like 30 weights because they are built on the thin side most of them anyhow.

Just as important is coolant. Do you change it often? I say so because I did mess up one of my Bronco's cooling system by not changing yearly with IAT coolant. With so few miles maybe every two years, use an IAT coolant and distilled water.

Re: 1973 Bronco w/original 302 [Re: BKinSD] #5214560 09/16/19 06:00 PM
Joined: Oct 2014
Posts: 849
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NH73 Offline
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Joined: Oct 2014
Posts: 849
5w20. That is what they use now.


2017 Toyota RAV4 Hybrid
2004 Ford Explorer Sport Trac
2012 Gravely ZT XL 48 w/ Kawasaki FR730
Re: 1973 Bronco w/original 302 [Re: BKinSD] #5214563 09/16/19 06:03 PM
Joined: Dec 2017
Posts: 2,804
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JLTD Offline
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Originally Posted by NH73
5w20. That is what they use now.


LOL LOL crackmeup


Originally Posted by BKinSD
Hi there, I have an old Bronco with the original 302, still runs quite well. I use 10w30 in it but am interested if others think I should use something else. I drive it year around but not daily, in South Dakota from temps of 0F to 100F, about 3000 miles a year. It has just over 100k on it at present. Thoughts?


What does your owner's manual say? I'd say if you've been doing well on the 10w-30...stick with it, or go to a -40. 10w-xx is good down to around -18°F / -28°C


I use the overseas manual to choose my viscosity.

Using AMSOIL

Hers: 2008 Jeep Liberty 154k, SS 5w30/Amsoil

His: 2015 4Runner 60k, SS 5w20/Amsoil

Re: 1973 Bronco w/original 302 [Re: JLTD] #5214576 09/16/19 06:13 PM
Joined: Oct 2014
Posts: 849
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NH73 Offline
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Joined: Oct 2014
Posts: 849
Originally Posted by JLTD
Originally Posted by NH73
5w20. That is what they use now.


LOL LOL crackmeup


Originally Posted by BKinSD
Hi there, I have an old Bronco with the original 302, still runs quite well. I use 10w30 in it but am interested if others think I should use something else. I drive it year around but not daily, in South Dakota from temps of 0F to 100F, about 3000 miles a year. It has just over 100k on it at present. Thoughts?


What does your owner's manual say? I'd say if you've been doing well on the 10w-30...stick with it, or go to a -40. 10w-xx is good down to around -18°F / -28°C
A learned a lot since them. Better oils, better engines. Your old 302 will work like a coyote. The old stiff didn't last 100,000 miles.

Last edited by NH73; 09/16/19 06:17 PM.

2017 Toyota RAV4 Hybrid
2004 Ford Explorer Sport Trac
2012 Gravely ZT XL 48 w/ Kawasaki FR730
Re: 1973 Bronco w/original 302 [Re: BKinSD] #5214584 09/16/19 06:19 PM
Joined: Mar 2017
Posts: 11,051
PimTac Offline
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Posts: 11,051
I would stay the course with the 10w30. When it gets cold hook up a oil pan warmer.


2017 Mazda CX5
Havoline Pro DS 0w20
Roki OEM filter.
Re: 1973 Bronco w/original 302 [Re: BKinSD] #5214618 09/16/19 07:05 PM
Joined: Aug 2011
Posts: 1,112
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kstanf150 Offline
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Joined: Aug 2011
Posts: 1,112
Originally Posted by BKinSD
Hi there, I have an old Bronco with the original 302, still runs quite well. I use 10w30 in it but am interested if others think I should use something else. I drive it year around but not daily, in South Dakota from temps of 0F to 100F, about 3000 miles a year. It has just over 100k on it at present. Thoughts?


Apparently what you’ve been doing is working just fine
If I changed anything I might run a 10-40 in the summer and a 5-30 in the winter but that’s just me

But hey Welcome to the club 👍

Re: 1973 Bronco w/original 302 [Re: BKinSD] #5214823 09/17/19 12:22 AM
Joined: Oct 2015
Posts: 3,198
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FordCapriDriver Offline
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Valvoline VR1 10W-30 is what i'd run.


1975 Ford Capri II Ghia 3000 V6 - Repsol Elite Super 20W-50
1988 Ford Escort XR3i Cabrio - Shell Rimula R4X 15W-40 HDEO

Re: 1973 Bronco w/original 302 [Re: skyactiv] #5214844 09/17/19 01:28 AM
Joined: Aug 2011
Posts: 2,245
GumbyJarvis Offline
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Joined: Aug 2011
Posts: 2,245
Originally Posted by skyactiv
Shell Rotella T5 10W30. Available at Walmart.

This^

Or Rotella T6 5w40


2018 RAM 1500 SLT 5.7L
Schaeffers 5w20 - Carquest Red


Disabled US Army Vet
OEF 2013-2014
Re: 1973 Bronco w/original 302 [Re: BKinSD] #5214920 09/17/19 06:15 AM
Joined: Aug 2010
Posts: 6,863
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Kira Offline
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20 years ago an inaugural Ford Bronco died and the young man who owned it showed up to buy my sister's battered Toyota pickup.
That was December 31st 1999. He needed a vehicle fast.

I want to say it was a 1960 or '61 Bronco.
It had a cowboy on a bucking bronco emblem on the rear gate.
How I wish I had pried it off to make a belt buckle.

Re: 1973 Bronco w/original 302 [Re: BKinSD] #5214942 09/17/19 06:41 AM
Joined: Jan 2016
Posts: 1,005
Duffyjr Offline
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Posts: 1,005
Originally Posted by BKinSD
Hi there, I have an old Bronco with the original 302, still runs quite well. I use 10w30 in it but am interested if others think I should use something else. I drive it year around but not daily, in South Dakota from temps of 0F to 100F, about 3000 miles a year. It has just over 100k on it at present. Thoughts?


If you don't drive it when it's below 0F then I would stay with 10w30. VR1 or Valvoline Daily Protection would be my choice in your case.


89 GMC Sierra Advanced 5w30/51036 Wix
08 Lucerne CX Advanced 5w30/1040 Gold
18 Toro Super Recycler VWB SAE 30
Re: 1973 Bronco w/original 302 [Re: BKinSD] #5215010 09/17/19 07:45 AM
Joined: Apr 2008
Posts: 40,516
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OVERKILL Offline
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I eventually settled on M1 0w-40 for all the 302's I've owned and worked on, though I'm running D1 ESP 5w-40 in the 351W (GT4) in our boat. Tear-down results have shown excellent cleanliness in the old Windsors and even with a fuel diluting carb setup, no visible wear (I did not mic anything). That said, if you don't drive it year-round, any 10w-30 will work fine in that lo-po Windsor. I 2nd Burla's recommendation of a synthetic media filter, you'll likely be able to score the FRAM Ultra on Amazon for pretty cheap.


2019 RAM 1500 Sport - Mobil 1 EP 0w-20, FRAM Ultra
2016 Grand Cherokee SRT - Ravenol SSL 0w-40, FRAM Ultra
Re: 1973 Bronco w/original 302 [Re: Kira] #5215087 09/17/19 09:07 AM
Joined: Aug 2011
Posts: 1,112
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kstanf150 Offline
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Joined: Aug 2011
Posts: 1,112
[quote=Kira]20 years ago an inaugural Ford Bronco died and the young man who owned it showed up to buy my sister's battered Toyota pickup.
That was December 31st 1999. He needed a vehicle fast.

I want to say it was a 1960 or '61 Bronco.
It had a cowboy on a bucking bronco emblem on the rear gate.
How I wish I had pried it off to make a belt buckle.

[/quote


Ford didn’t offer a Bronco in 60/61’
It was introduced in August of 1965

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