{"id":8092,"date":"2026-01-23T16:38:49","date_gmt":"2026-01-23T22:38:49","guid":{"rendered":"https:\/\/staging.phillips66.com\/phillips66lubricantscom\/?p=8092"},"modified":"2026-03-02T12:13:00","modified_gmt":"2026-03-02T18:13:00","slug":"extended-drain-intervals-in-heavy-duty-fleet-operations","status":"publish","type":"post","link":"https:\/\/staging.phillips66.com\/phillips66lubricantscom\/white-papers-and-technical-briefs\/extended-drain-intervals-in-heavy-duty-fleet-operations\/","title":{"rendered":"Extended Oil Drain Intervals in Heavy-Duty Fleet Operations"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Effects of Guardol ECT<sup>\u00ae<\/sup> on engine cleanliness and wear protection<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In heavy-duty fleet operations, fleet managers know that uptime is critical. Engine oil plays a key role in protecting equipment, managing engine wear, and supporting extended oil drain intervals over long haul cycles. This case study examines real-world fleet performance data, including oil analysis and a full engine teardown, to evaluate how extended drain intervals impact engine cleanliness, wear protection, and overall fleet reliability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Through documented field testing, oil analysis, and teardown inspection after more than 750,000 miles, this lubricant performance study provides insight into how extended drain strategies can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"wp-block-list-item\">reduce fleet downtime<\/li>\n\n\n\n<li class=\"wp-block-list-item\">improve maintenance efficiency<\/li>\n\n\n\n<li class=\"wp-block-list-item\">support long-term engine durability in high-mileage, heavy-duty applications<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/phillips66.widen.net\/s\/tjcjftdjk9\/guardol-extended-drain-intervals-heavy-duty-fleet-case-study\" target=\"_blank\" rel=\"noreferrer noopener\">Read the full story<\/a><\/p>\n\n\n\n<h5 class=\"wp-block-heading\">The extended drain results in this study were achieved using Guardol ECT\u00ae.<\/h5>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>GUARDOL ECT<\/strong><\/h3>\n\n\n\n<div class=\"wp-block-columns mt-xs is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SYNTHETIC BLEND<\/strong><br>API CK-4 10W-30, 15W-40<\/p>\n\n\n\n<p class=\"is-style-overline has-small-font-size wp-block-paragraph\"><strong>Applications<\/strong><\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">On-highway diesel trucks, off-highway construction, earth moving and mining equipment in severe duty service.<\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><strong>Key Benefits<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-small-font-size wp-block-list-item\">Excellent protection for newer low-emission diesel engines and older diesel engines<\/li>\n\n\n\n<li class=\"has-small-font-size wp-block-list-item\">Exclusive Liquid Titanium protection additive provides enhanced oxidation resistance and protection against engine wear<\/li>\n\n\n\n<li class=\"has-small-font-size wp-block-list-item\">Outstanding soot control for protection against abrasive wear and soot-induced oil thickening<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\"><figure class=\"wp-block-image align wp-block-psx-widen-image\">\n\t<img decoding=\"async\" src=\"https:\/\/phillips66.widen.net\/content\/7dggrhzhlg\/png\/P66_1G_GUARDOL_ECT_10W-30_ON_WHITE.png?position=c&#038;color=ffffff00&#038;quality=100&#038;u=pqrmwb&#038;retina=true\" width=\"630\" height=\"700\" alt=\"\" loading=\"lazy\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:27px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>Ready to put Guardol ECT to work? Find a distributor near you.<\/strong><\/h5>\n\n\n\n<div class=\"wp-block-columns mt-xs is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:300px\">\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill is-size-small\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/staging.phillips66.com\/phillips66lubricantscom\/find-distributor\/\" target=\"_blank\" rel=\"noreferrer noopener\">Find a Distributor<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill is-size-small\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/staging.phillips66.com\/phillips66lubricantscom\/product\/guardol-ect-synthetic-blend-diesel-engine-oil\/)\" target=\"_blank\" rel=\"noreferrer noopener\">See Specs<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns alignwide is-not-stacked-on-mobile is-style-default is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Effects of Guardol ECT\u00ae on engine cleanliness and wear protection In heavy-duty fleet operations, fleet managers know that uptime is critical. Engine oil plays a key role in protecting equipment, managing engine wear, and supporting extended oil drain intervals over long haul cycles. This case study examines real-world fleet performance data, including oil analysis and [&hellip;]<\/p>\n","protected":false},"author":102,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","widen_thumbnail_url":"https:\/\/phillips66.widen.net\/content\/hrzs9bgyo8\/jpeg\/shutterstock_597653282.jpeg?position=c&color=ffffffff&quality=100&u=4ny3tt","widen_thumbnail_width":"2048","widen_thumbnail_height":"1128","widen_thumbnail_focal_point_x":"","widen_thumbnail_focal_point_y":"","psx_hero_image_url":"https:\/\/phillips66.widen.net\/content\/hrzs9bgyo8\/jpeg\/shutterstock_597653282.jpeg?position=c&color=ffffffff&quality=100&u=4ny3tt","psx_hero_image_width":"2048","psx_hero_image_height":"1128","psx_hero_image_focal_point_x":"","psx_hero_image_focal_point_y":"","psx_hero_image_mobile_url":"","psx_hero_image_mobile_width":"","psx_hero_image_mobile_height":"","psx_hero_image_mobile_focal_point_x":"","psx_hero_image_mobile_focal_point_y":"","psx_byline":""},"categories":[14],"class_list":["post-8092","post","type-post","status-publish","format-standard","hentry","category-white-papers-and-technical-briefs"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Extended Oil Drain Intervals in Heavy-Duty Fleet Operations - Phillips 66 Lubricants<\/title>\n<meta name=\"description\" content=\"Cut fleet downtime with extended oil drain intervals. See how Guardol ECT achieved 75K-mile intervals, backed by oil analysis &amp; engine teardown results.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Extended Oil Drain Intervals in Heavy-Duty Fleet Operations - Phillips 66 Lubricants\" \/>\n<meta property=\"og:description\" content=\"Cut fleet downtime with extended oil drain intervals. 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